youtube.com

youtube.com is SSL secured

Free website and domain report on youtube.com

Last Updated: 18th November, 2024
Overview

Snoop Summary for youtube.com

This is a free and comprehensive report about youtube.com. The domain youtube.com is currently hosted on a server located in United States with the IP address 172.253.122.190, where the local currency is USD and English is the local language. Our records indicate that youtube.com is owned/operated by Google LLC. Youtube.com is expected to earn an estimated $4,193,403 USD per day from advertising revenue. The sale of youtube.com would possibly be worth $3,061,184,553 USD. This figure is based on the daily revenue potential of the website over a 24 month period. Youtube.com is unbelievably popular with an estimated 303,525,086 daily unique visitors. This report was last updated 18th November, 2024.

About youtube.com

Site Preview:youtube.com youtube.com
Title:YouTube
Description:Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.
Keywords and Tags:amazon, baby shark, camera phone, facebook, fox news, free, google, hochladen, james charles, kamerahandy, kostenlos, lizzo, m, media sharing, old town road, p, peppa pig, sharing, streaming media, teilen, upload, video, video phone, videohandy, y, yotube, you tube, youtube, youtube music, youtube tv, youtube videos, yt
Related Terms:and youtube, apk4free youtube, dabbe 6 fragman youtube, fx youtube tv, keepvid youtube, pingler youtube, youtube harald baldr, youtube teluguone, youtube to mo3, youtube together
Fav Icon:
Age:Over 19 years old
Domain Created:15th February, 2005
Domain Updated:14th January, 2024
Domain Expires:15th February, 2025
Review

Snoop Score

5/5 (Perfect!)

Valuation

$3,061,184,553 USD
Note: All valuation figures are estimates.

Popularity

Worldwide Sensation
Note: Popularity is estimated.

Rank, Reach and Authority

Alexa Rank: 2
Alexa Reach:
SEMrush Rank (US): 2
SEMrush Authority Score: 98
Moz Domain Authority: 0
Moz Page Authority: 0

Organic vs Paid (Google Ads)

OrganicPaid
Keywords: 94,330,2662,964
Traffic: 1,126,219,371518,095
Cost: $756,701,218 USD$2,377,875 USD
Traffic

Visitors

Daily Visitors:303,525,086
Monthly Visitors:9,238,347,483
Yearly Visitors:110,786,656,390
Note: All visitors figures are estimates.

Visitors By Country

Revenue

Revenue

Daily Revenue:$4,193,403 USD
Monthly Revenue:$127,633,992 USD
Yearly Revenue:$1,530,592,272 USD
Note: All revenue figures are estimates.

Revenue By Country

SEO

Backlinks Analysis (SEMrush)

Backlinks:26,970,957,236
Referring Domains:13,015,325
Referring IPs:3,149,583
Youtube.com has 26,970,957,236 backlinks according to SEMrush. 72% of these backlinks are "dofollow" (follow) links which allow the flow of link equity to pass through, which may improve youtube.com's search engine rankings. Other links are treated as 'hints' by search engines and may also pass link equity, depending on what search engines decide in each case.
100% of youtube.com's backlinks are text and image links, which are ideal for SEO. Other backlink types may be unrecognized or ignored by search engines.

Top New Follow Links

1
Source: https://ma.tt/
Target: https://www.youtube.com/watch?v=u6XAPnuFjJc

2
Source: https://ma.tt/
Target: https://www.youtube.com/watch?v=mJSf2Clx6qY

3
Source: https://www.flosports.tv/
Target: https://www.youtube.com/c/FloSports

4
Source: http://government.ru/
Target: http://www.youtube.com/user/pravitelstvoRF

5
Source: http://web.mit.edu/
Target: https://www.youtube.com/watch?v=HI7E1ME40ps

Top Ranking Keywords (US)

1
Keyword: youtube
Ranked Page: https://www.youtube.com/

2
Keyword: youtube tv
Ranked Page: https://tv.youtube.com/

3
Keyword: youtube music
Ranked Page: https://music.youtube.com/

4
Keyword: yt
Ranked Page: https://www.youtube.com/user/YT

5
Keyword: y
Ranked Page: https://www.youtube.com/channel/UCBR8-60-B28hp2BmDPdntcQ

Domain Analysis

ValueLength
Domain:youtube.com11
Domain Name:youtube7
Extension (TLD):com3
Expiry Check:

Page Speed Analysis

Average Load Time:2.59 seconds
Load Time Comparison:Faster than 22% of sites

PageSpeed Insights

Avg. (All Categories) 62
Performance 28
Accessibility 87
Best Practices 75
SEO 75
PWA 44
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
URL: https://www.youtube.com/
Updated: 21st January, 2023

1.05 seconds
First Contentful Paint (FCP)
87%
6%
7%

0.01 seconds
First Input Delay (FID)
92%
4%
4%

Simulate loading on desktop
28

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for youtube.com. This includes details about optimizing page load times which can result in a better user experience.

Metrics

Cumulative Layout Shift — 0.027
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data

Other

Properly size images — Potential savings of 319 KiB
Images can slow down the page's load time. Youtube.com should consider serving more appropriate-sized images.
URLResource Size (Bytes)Potential Savings (Bytes)
https://i.ytimg.com/vi/n5zNdiQEtrQ/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLAWpXs6lMUjprF21-P9_QxoSTRfOw
92176
80711
https://i.ytimg.com/vi/xAqu4ogdp4Y/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLAH8D4sXU3Dpg9yxUVuFPb4ynmA9A
62706
54907
https://i.ytimg.com/vi/CJ2AH3LJeic/hq720.jpg?sqp=-oaymwE2CNAFEJQDSFXyq4qpAygIARUAAIhCGAFwAcABBvABAfgB_gmAAtAFigIMCAAQARhyIFQoPzAP&rs=AOn4CLBFaEZdHKtKWH-C36hRukNp5nngGQ
43176
37806
https://i.ytimg.com/vi/_Rks2oCRS88/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLDf4Dpz89e82Nvv5TXKrohtTJA4fw
40888
35802
https://i.ytimg.com/vi/jfKfPfyJRdk/hq720_live.jpg?sqp=CPCwr54G-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLBVwm58Qs25eze6n2LOGHQENrqcag
38438
33657
https://i.ytimg.com/vi/Qx7wZxMPE8I/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLA33UiQqOW-otGY4QUCbwgSrus2mw
34798
30470
https://www.gstatic.com/youtube/img/promos/growth/ed7ea9be9d5d6ec28d3e1038aa31e35771529feb8ecc54788fe1bab62e354916_2560x520.jpeg
22017
16513
https://i.ytimg.com/vi/eeNjYd72JLY/hq720_live.jpg?sqp=CPCwr54G-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLAmMHoJgScIZ5wajJic7760C2o6ew
17474
15301
https://i.ytimg.com/vi/6Ij9PiehENA/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLAkbqT0YziQSzkFlTf5YhdJHsMyiw
15064
13190
https://www.gstatic.com/youtube/img/promos/growth/864dc47e45a7a0b06602f73155980de282b939a6d0adc7bdcda231f965bf796a_640x48.png
11591
8693
Defer offscreen images
Time to Interactive can be slowed down by resources on the page. Youtube.com should consider lazy-loading offscreen and hidden images.
Minify CSS — Potential savings of 29 KiB
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Youtube.com should consider minifying CSS files.
URLTransfer Size (Bytes)Potential Savings (Bytes)
html:not(.style-scope) { --primary-text-color: var(--light-theme-text-color); --primary-backgrou...
431008
29619
Minify JavaScript
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Youtube.com should consider minifying JS files.
Reduce unused CSS — Potential savings of 451 KiB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Youtube.com should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.
URLTransfer Size (Bytes)Potential Savings (Bytes)
html:not(.style-scope) { --primary-text-color: var(--light-theme-text-color); --primary-backgrou...
431008
410775
https://www.youtube.com/s/player/4248d311/www-player.css
50705
50705
Efficiently encode images — Potential savings of 13 KiB
Unoptimized images can consume more cellular data than what is necessary.
URLResource Size (Bytes)Potential Savings (Bytes)
https://www.gstatic.com/youtube/img/promos/growth/ed7ea9be9d5d6ec28d3e1038aa31e35771529feb8ecc54788fe1bab62e354916_2560x520.jpeg
22017
13813
Serve images in next-gen formats — Potential savings of 27 KiB
Consider JPEG 2000, JPEG XR or WebP image formats which provide better compression than PNG and JPEG.
URLResource Size (Bytes)Potential Savings (Bytes)
https://www.gstatic.com/youtube/img/promos/growth/ed7ea9be9d5d6ec28d3e1038aa31e35771529feb8ecc54788fe1bab62e354916_2560x520.jpeg
22017
18980.4
https://www.gstatic.com/youtube/img/promos/growth/864dc47e45a7a0b06602f73155980de282b939a6d0adc7bdcda231f965bf796a_640x48.png
11591
8734
Enable text compression
Text-based resources should be served with compression, such as gzip, deflate or brotli.
Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.
Initial server response time was short — Root document took 250 ms
It is advised to keep the server response time short for the main document, because all other requests depend on it.
URLTime Spent (Ms)
https://www.youtube.com/
249.994
Preload key requests
Key requests can be preloaded by using '<link rel=preload>'. Youtube.com should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.
Remove duplicate modules in JavaScript bundles
Ensure that no duplicate JavaScript modules from bundles exist to reduce bytes consumed by network activity.
Avoid serving legacy JavaScript to modern browsers
Polyfills and transforms enable legacy browsers to use new JavaScript features. For bundled JavaScript it is recommended to adopt a modern script deployment strategy using module/nomodule feature detection. This will reduce the amount of code shipped to modern browsers.
Avoid chaining critical requests — 17 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Youtube.com should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
User Timing marks and measures — 30 user timings
Make use of the User Timing API to measure an app's real-world performance during key user experiences.
NameTypeStart Time (Ms)Duration (Ms)
mark_rsef_dpj
Mark
4292.216
mark_rsae_dpj
Mark
4293.113
mark_js_r
Mark
4293.532
mark_ac
Mark
4293.972
mark_apr
Mark
4294.49
mark_pdc
Mark
4294.924
mark_pdr
Mark
4349.175
mark_gcc
Mark
4350.728
mark_dl
Mark
4412.011
mark_pr
Mark
4470.98
mark_lps
Mark
4487.043
mark_hgcr
Mark
4703.415
mark_pdl
Mark
4705.361
mark_nd
Mark
4706.602
mark_pda
Mark
4808.092
mark_adl
Mark
4816.241
mark_bcp
Mark
4816.905
mark_cpt
Mark
5939.114
mark_gle
Mark
6169.617
mark_gle
Mark
6262.932
mark_gpe
Mark
6279.077
mark_gpe
Mark
6279.454
mark_pe
Mark
6956.915
mark_pot_isc
Mark
6994.204
mark_fs
Mark
7016.284
mark_pot_ist
Mark
7171.043
mark_pot_if
Mark
7424.796
mark_pot_cms
Mark
7425.49
mark_pot_cmf
Mark
7426.841
mark_cmi
Mark
7575.779
All text remains visible during webfont loads
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.
Keep request counts low and transfer sizes small — 65 requests • 3,160 KiB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.
Resource TypeRequestsTransfer Size (Bytes)
Total
65
3236200
Script
14
2395064
Image
20
418665
Document
2
160062
Other
15
106786
Stylesheet
6
64286
Font
4
61904
Media
4
29433
Third-party
36
674282
Minimize third-party usage — Third-party code blocked the main thread for 0 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.
Third-PartyTransfer Size (Bytes)Main-Thread Blocking Time (Ms)
108265
0
83657
0
63595
0
2770
0
Lazy load third-party resources with facades
Consider replacing third-party embeds with a facade until they are required (use lazy loading).
Largest Contentful Paint element — 1 element found
The element which was identified as the Largest Contentful Paint.
Element
Largest Contentful Paint image was not lazily loaded
Above-the-fold images that are lazily loaded render later in the page lifecycle, which can delay the largest contentful paint.
Element
Avoid large layout shifts — 3 elements found
Below is a list of all DOM elements that contribute to the CLS of the page.
ElementCLS Contribution
0.027376236756851
0.016633551060911
9.7597992003035E-5
Avoids `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.
Avoid long main-thread tasks — 10 long tasks found
Below is a list of the longest tasks on the main thread, which is useful when identifying the worst input delay contributors.
URLStart Time (Ms)Duration (Ms)
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/desktop_polymer.vflset/desktop_polymer.js
2502.7897439327
1656
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/web-animations-next-lite.min.vflset/web-animations-next-lite.min.js
4446.7897439327
503
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/desktop_polymer.vflset/desktop_polymer.js
4243.7897439327
196
https://www.youtube.com/s/player/4248d311/player_ias.vflset/en_US/base.js
5960.8179350411
161
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/desktop_polymer.vflset/desktop_polymer.js
5236.7897439327
115
https://www.youtube.com/s/player/4248d311/player_ias.vflset/en_US/base.js
6126.8179350411
98
https://www.youtube.com/s/player/4248d311/player_ias.vflset/en_US/base.js
5871.8179350411
89
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/spf.vflset/spf.js
6224.8179350411
88
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/web-animations-next-lite.min.vflset/web-animations-next-lite.min.js
5162.7897439327
74
https://www.youtube.com/
4183.7897439327
60
Avoid non-composited animations
It is recommended to avoid non-composited animations which are often janky and increase CLS.

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.
Timing budget
It is advised to set a timing budget to monitor the performance of your site.

Audits

Network Requests
Below is a list of network requests that were made during page load.
URLProtocolStart Time (Ms)End Time (Ms)Transfer Size (Bytes)Resource Size (Bytes)Status CodeMIME TypeResource Type
http://youtube.com/
http/1.1
0
21.16700001352
400
0
301
application/binary
https://youtube.com/
http/1.1
21.649000002071
55.065000007744
1386
0
301
application/binary
https://www.youtube.com/
h2
55.802000002586
304.81900001178
69839
736816
200
text/html
Document
https://i.ytimg.com/generate_204
h2
325.0670000125
328.60400000936
268
0
204
text/plain
Other
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/desktop_polymer.vflset/desktop_polymer.js
h2
325.18500000879
428.74500001199
1661407
9991794
200
text/javascript
Script
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/web-animations-next-lite.min.vflset/web-animations-next-lite.min.js
h2
326.1310000089
331.90000000468
15965
50695
200
text/javascript
Script
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/custom-elements-es5-adapter.vflset/custom-elements-es5-adapter.js
h2
326.5090000059
395.12800000375
1546
1980
200
text/javascript
Script
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/webcomponents-sd.vflset/webcomponents-sd.js
h2
326.87000000442
336.67800000694
23661
78244
200
text/javascript
Script
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/intersection-observer.min.vflset/intersection-observer.min.js
h2
327.04900001409
332.37800000643
2890
5547
200
text/javascript
Script
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/scheduler.vflset/scheduler.js
h2
327.40300000296
332.98600000853
3412
6750
200
text/javascript
Script
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/www-i18n-constants-en_US.vflset/www-i18n-constants.js
h2
327.63700000942
332.64200000849
2329
5107
200
text/javascript
Script
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/www-tampering.vflset/www-tampering.js
h2
327.9950000142
337.09600000293
4371
10010
200
text/javascript
Script
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/spf.vflset/spf.js
h2
328.13300000271
338.02800001286
14440
39697
200
text/javascript
Script
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/network.vflset/network.js
h2
328.2920000056
333.58300001419
6001
13822
200
text/javascript
Script
https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&family=YouTube+Sans:wght@300..900&display=swap
h2
329.02100001229
345.98900000856
1691
10856
200
text/css
Stylesheet
https://www.youtube.com/s/desktop/82a4cf4f/cssbin/www-main-desktop-home-page-skeleton.css
h2
329.16600001045
336.05800000078
1726
4107
200
text/css
Stylesheet
https://www.youtube.com/s/desktop/82a4cf4f/cssbin/www-onepick.css
h2
329.37800000946
334.78900000046
1031
841
200
text/css
Stylesheet
https://www.youtube.com/s/_/ytmainappweb/_/ss/k=ytmainappweb.kevlar_base.CpqFn3c0xgQ.L.B1.O/am=AAM/d=0/br=1/rs=AGKMywGTVHOXh10uFVA5NBllrm2L1HycsQ
h2
329.84200000647
339.31400001165
7392
56402
200
text/css
Stylesheet
https://www.youtube.com/s/desktop/82a4cf4f/cssbin/www-main-desktop-watch-page-skeleton.css
h2
329.98500000394
337.51200001279
1741
5073
200
text/css
Stylesheet
https://accounts.google.com/ServiceLogin?service=youtube&uilel=3&passive=true&continue=https%3A%2F%2Fwww.youtube.com%2Fsignin%3Faction_handle_signin%3Dtrue%26app%3Ddesktop%26hl%3Den%26next%3D%252Fsignin_passive%26feature%3Dpassive&hl=en
http/1.1
443.73500000802
474.87300001376
1732
0
302
text/html
https://fonts.gstatic.com/s/roboto/v30/KFOmCnqEu92Fr1Mu4mxKKTU1Kg.woff2
h2
446.18900000933
449.6780000045
11956
11028
200
font/woff2
Font
https://accounts.google.com/v3/signin/identifier?dsh=S-804333666%3A1674303704438409&continue=https%3A%2F%2Fwww.youtube.com%2Fsignin%3Faction_handle_signin%3Dtrue%26app%3Ddesktop%26hl%3Den%26next%3D%252Fsignin_passive%26feature%3Dpassive&hl=en&passive=true&service=youtube&uilel=3&flowName=GlifWebSignIn&flowEntry=ServiceLogin&ifkv=AWnogHfxOcBBeZrDDcy1m42hVodWJUJImVbi7pSCfmZUro4Ck9Wq4VtSNvAlkILkcI2pHnSIsABH3Q
h2
475.20100000838
575.93900000211
90223
0
200
text/html
Document
https://www.gstatic.com/youtube/img/emojis/emojis-svg-9.json
h2
1551.5840000007
1581.7760000064
48578
925282
200
application/json
XHR
https://googleads.g.doubleclick.net/pagead/id
http/1.1
2855.3640000027
4405.4060000053
913
0
302
text/html
https://www.youtube.com/s/search/audio/failure.mp3
h2
4287.5130000029
4293.0420000048
7316
6529
206
audio/mpeg
Media
https://www.youtube.com/s/search/audio/no_input.mp3
h2
4288.504000011
4293.457000007
7740
6953
206
audio/mpeg
Media
https://www.youtube.com/s/search/audio/open.mp3
h2
4289.2150000116
4293.7810000003
6954
6167
206
audio/mpeg
Media
https://www.youtube.com/s/search/audio/success.mp3
h2
4289.9530000141
4294.310000012
7423
6636
206
audio/mpeg
Media
https://googleads.g.doubleclick.net/pagead/id?slf_rd=1
h2
4405.6950000086
4410.2220000059
993
100
200
application/json
XHR
https://fonts.gstatic.com/s/roboto/v30/KFOlCnqEu92Fr1MmEU9fBBc4AMP6lQ.woff2
h2
4660.1360000059
4663.9010000072
12000
11072
200
font/woff2
Font
https://www.youtube.com/youtubei/v1/guide?key=AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8&prettyPrint=false
h2
4727.143000011
4747.5100000011
3495
16517
200
application/json
Fetch
https://www.gstatic.com/youtube/img/promos/growth/ed7ea9be9d5d6ec28d3e1038aa31e35771529feb8ecc54788fe1bab62e354916_2560x520.jpeg
h2
4804.0390000097
4808.5390000051
22754
22017
200
image/jpeg
Image
https://fonts.gstatic.com/s/roboto/v30/KFOlCnqEu92Fr1MmWUlfBBc4AMP6lQ.woff2
h2
4813.1460000004
4817.0690000115
11968
11040
200
font/woff2
Font
https://fonts.gstatic.com/s/youtubesans/v18/Qw38ZQNGEDjaO2m6tqIqX5E-AVS5_rSejo46_PCTRspJ0OosolrBEJL3HO_T7fHoCVHx.woff2
h2
5703.9160000131
5708.0440000136
25980
25052
200
font/woff2
Font
https://www.google.com/pagead/lvz?evtid=AG75Ol7T4R9sDSAqqR28ggBAMVHq-WTgajh_w7zJM5oF9_EBkIVXttzgQlanaEeVrSfCy1ejWTT61zNfhMLFfsYC801lwqhdnw&req_ts=1674303704&pg=MainAppBootstrap%3AHome&az=1&sigh=AC1VdmWO-GU4qrbZBA3q8NDFVLSKB1dnsQ
h2
5857.4120000121
5870.5670000054
1025
42
200
image/gif
Image
https://www.youtube.com/youtubei/v1/feedback?key=AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8&prettyPrint=false
h2
5991.1680000077
6027.8990000079
1390
2159
200
application/json
Fetch
https://yt3.ggpht.com/ytc/AMLnZu_HtwMgEDPHCoQoobS_gyarjN3jPbzEfZXTsQJv=s68-c-k-c0x00ffffff-no-rj
h2
6005.2460000006
6010.4350000038
4265
3640
200
image/jpeg
Image
https://yt3.ggpht.com/ytc/AMLnZu_hprZ-tNNRtJk12zsOOowLRYaQa0YwKtaNDuhu0A=s88-c-k-c0x00ffffff-no-rj
h2
6005.4470000032
6013.5270000028
4925
4300
200
image/jpeg
Image
https://yt3.ggpht.com/ytc/AMLnZu8fIT4MTyobgM_deRkvcWBMIhKpAeIGfgqqob5p=s68-c-k-c0x00ffffff-no-rj
h2
6006.0160000139
6010.9430000011
3617
2992
200
image/jpeg
Image
https://yt3.ggpht.com/KNYElmLFGAOSZoBmxYGKKXhGHrT2e7Hmz3WsBerbam5uaDXFADAmT7htj3OcC-uK1O88lC9fQg=s68-c-k-c0x00ffffff-no-rj
h2
6006.2840000028
6011.2530000042
4702
4067
200
image/jpeg
Image
https://www.gstatic.com/youtube/img/promos/growth/864dc47e45a7a0b06602f73155980de282b939a6d0adc7bdcda231f965bf796a_640x48.png
h2
6006.6700000025
6014.9710000114
12325
11591
200
image/png
Image
https://yt3.ggpht.com/-Z9-8HaiNm83Me5l_jqMXmCNWSuTxTFG_3S5GEjuzikPaP3zMuUyAzfUAWqJOpgp2ut4-2-ltg=s68-c-k-c0x00ffffff-no-rj
h2
6007.002000013
6012.453000003
3023
2390
200
image/jpeg
Image
https://yt3.ggpht.com/ytc/AMLnZu_pmZyWJhTKDAI4gHXQK1Y2AiTp6WfvIJ8syslwYA=s68-c-k-c0x00ffffff-no-rj
h2
6007.3250000132
6012.023000003
4601
3975
200
image/jpeg
Image
https://yt3.ggpht.com/ytc/AMLnZu9a6wmBXHHW48ZOYrIb__apvgZAZ6qxQFB11e124w=s68-c-k-c0x00ffffff-no-rj
h2
6007.63800001
6019.3320000108
1485
863
200
image/jpeg
Image
https://yt3.ggpht.com/ytc/AMLnZu9grnfIzmQUrS0u5CYtZdab7ybvpvUo7HwYcKDX2w=s68-c-k-c0x00ffffff-no-rj
h2
6007.9780000087
6012.7480000083
5054
4427
200
image/jpeg
Image
https://i.ytimg.com/vi/_Rks2oCRS88/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLDf4Dpz89e82Nvv5TXKrohtTJA4fw
h2
6010.1730000024
6017.2080000048
41638
40888
200
image/webp
Image
https://i.ytimg.com/vi/eeNjYd72JLY/hq720_live.jpg?sqp=CPCwr54G-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLAmMHoJgScIZ5wajJic7760C2o6ew
h2
6011.663000012
6044.3870000017
18188
17474
200
image/webp
Image
https://i.ytimg.com/vi/CJ2AH3LJeic/hq720.jpg?sqp=-oaymwE2CNAFEJQDSFXyq4qpAygIARUAAIhCGAFwAcABBvABAfgB_gmAAtAFigIMCAAQARhyIFQoPzAP&rs=AOn4CLBFaEZdHKtKWH-C36hRukNp5nngGQ
h2
6013.1690000126
6022.9480000125
43915
43176
200
image/webp
Image
https://i.ytimg.com/vi/jfKfPfyJRdk/hq720_live.jpg?sqp=CPCwr54G-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLBVwm58Qs25eze6n2LOGHQENrqcag
h2
6013.2870000089
6025.1430000062
39152
38438
200
image/webp
Image
https://i.ytimg.com/vi/Qx7wZxMPE8I/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLA33UiQqOW-otGY4QUCbwgSrus2mw
h2
6013.4000000107
6024.7180000006
35536
34798
200
image/webp
Image
https://i.ytimg.com/vi/xAqu4ogdp4Y/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLAH8D4sXU3Dpg9yxUVuFPb4ynmA9A
h2
6016.4220000006
6025.7210000127
63453
62706
200
image/webp
Image
https://i.ytimg.com/vi/6Ij9PiehENA/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLAkbqT0YziQSzkFlTf5YhdJHsMyiw
h2
6016.5450000059
6021.7590000102
15814
15064
200
image/webp
Image
https://i.ytimg.com/vi/n5zNdiQEtrQ/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLAWpXs6lMUjprF21-P9_QxoSTRfOw
h2
6016.678
6023.5700000048
92925
92176
200
image/webp
Image
https://www.youtube.com/s/player/4248d311/player_ias.vflset/en_US/base.js
h2
6663.3410000068
6700.5470000004
612046
2198246
200
text/javascript
Script
https://www.youtube.com/s/player/4248d311/www-player.css
h2
6664.2420000135
6689.8380000057
50705
368291
200
text/css
Stylesheet
https://www.youtube.com/youtubei/v1/log_event?alt=json&key=AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8
h2
6751.5780000103
6781.4840000065
508
28
200
application/json
XHR
https://www.youtube.com/s/player/4248d311/player_ias.vflset/en_US/offline.js
h2
7014.485000007
7018.0210000108
30847
128642
200
text/javascript
Script
https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/Create
h2
7182.0510000107
7202.1440000099
31295
66817
200
application/json+protobuf
XHR
https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/Create
h2
7175.8480000135
7181.5330000099
675
0
200
text/html
Preflight
https://static.doubleclick.net/instream/ad_status.js
h2
7184.448
7187.4970000063
864
29
200
text/javascript
Script
https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateIT
h2
7405.16200001
7413.6060000019
789
94
200
application/json+protobuf
XHR
https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateIT
h2
7398.4870000131
7404.6970000054
675
0
200
text/html
Preflight
https://www.youtube.com/youtubei/v1/att/get?key=AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8&prettyPrint=false
h2
8188.6620000005
8216.5120000136
13689
18431
200
application/json
XHR
https://www.google.com/js/th/Bdw2VvWHBnLyaZnICW60B-ZF7DgMaGaXgSsIEsc-hUM.js
h2
8223.0030000064
8230.1170000137
15285
37142
200
text/javascript
Script
https://www.youtube.com/generate_204?-K5xiQ
h2
8417.4570000032
8423.5110000009
268
0
204
text/plain
Image
Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.
URLTime Spent (Ms)
https://www.youtube.com
0.0030205007340898
Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.
URLTime Spent (Ms)
https://www.youtube.com
2.6769794992659
Tasks
Below is a list of the top-level main thread tasks that executed during page load.
Start Time (Ms)End Time (Ms)
311.023
23.685
357.72
7.443
399.25
44.889
444.152
6.124
450.903
15.536
578.325
6.811
893.91
48.1
942.021
3312.504
4254.59
6.854
4261.957
22.196
4291.744
60.102
4359.986
19.394
4379.603
20.287
4424.823
391.124
4815.988
14.528
4837.126
1006.014
5843.192
95.734
5941.73
72.437
6014.236
9.164
6024.835
24.301
6049.163
34.06
6086.283
32.795
6131.019
5.655
6143.48
50.497
6199.931
12.539
6212.507
63.466
6280.808
148.87
6437.805
230.202
6668.101
15.774
6687.631
5.017
6692.727
8.195
6701.213
21.624
6722.988
5.193
6865.12
12.04
6877.218
88.857
6969.023
160.623
7134.882
15.519
7151.808
7.823
7166.983
9.265
7204.321
195.179
7408.468
13.439
7421.954
5.204
8180.796
9.248
8233.806
7.232
8241.051
175.532
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data
Script Treemap Data
Provide as required, for treemap app.

Metrics

First Contentful Paint — 1.1 s
The time taken for the first image or text on the page to be rendered.

Other

Eliminate render-blocking resources — Potential savings of 430 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. Youtube.com should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.
URLTransfer Size (Bytes)Potential Savings (Ms)
https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&family=YouTube+Sans:wght@300..900&display=swap
1691
230
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/web-animations-next-lite.min.vflset/web-animations-next-lite.min.js
15965
80
Avoid multiple page redirects — Potential savings of 340 ms
Redirects can cause additional delays before the page can begin loading. Youtube.com should avoid multiple or unnecessary page redirects.
URLTime Spent (Ms)
http://youtube.com/
190
https://youtube.com/
150
https://www.youtube.com/
0
Preload Largest Contentful Paint image — Potential savings of 230 ms
It is recommended to preload images used by LCP elements, to improve LCP time.
URLPotential Savings (Ms)
https://www.gstatic.com/youtube/img/promos/growth/ed7ea9be9d5d6ec28d3e1038aa31e35771529feb8ecc54788fe1bab62e354916_2560x520.jpeg
229.9978314532
Avoid enormous network payloads — Total size was 3,160 KiB
Large network payloads can cost users money and are linked to long load times.
URLTransfer Size (Bytes)
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/desktop_polymer.vflset/desktop_polymer.js
1661407
https://www.youtube.com/s/player/4248d311/player_ias.vflset/en_US/base.js
612046
https://i.ytimg.com/vi/n5zNdiQEtrQ/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLAWpXs6lMUjprF21-P9_QxoSTRfOw
92925
https://accounts.google.com/v3/signin/identifier?dsh=S-804333666%3A1674303704438409&continue=https%3A%2F%2Fwww.youtube.com%2Fsignin%3Faction_handle_signin%3Dtrue%26app%3Ddesktop%26hl%3Den%26next%3D%252Fsignin_passive%26feature%3Dpassive&hl=en&passive=true&service=youtube&uilel=3&flowName=GlifWebSignIn&flowEntry=ServiceLogin&ifkv=AWnogHfxOcBBeZrDDcy1m42hVodWJUJImVbi7pSCfmZUro4Ck9Wq4VtSNvAlkILkcI2pHnSIsABH3Q
90223
https://www.youtube.com/
69839
https://i.ytimg.com/vi/xAqu4ogdp4Y/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLAH8D4sXU3Dpg9yxUVuFPb4ynmA9A
63453
https://www.youtube.com/s/player/4248d311/www-player.css
50705
https://www.gstatic.com/youtube/img/emojis/emojis-svg-9.json
48578
https://i.ytimg.com/vi/CJ2AH3LJeic/hq720.jpg?sqp=-oaymwE2CNAFEJQDSFXyq4qpAygIARUAAIhCGAFwAcABBvABAfgB_gmAAtAFigIMCAAQARhyIFQoPzAP&rs=AOn4CLBFaEZdHKtKWH-C36hRukNp5nngGQ
43915
https://i.ytimg.com/vi/_Rks2oCRS88/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLDf4Dpz89e82Nvv5TXKrohtTJA4fw
41638

Metrics

Time to Interactive — 6.4 s
The time taken for the page to become fully interactive.
Speed Index — 5.6 s
The time taken for the page contents to be visibly populated.
Total Blocking Time — 2,540 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).
Largest Contentful Paint — 4.7 s
The timing of the largest text or image that is painted.

Audits

Max Potential First Input Delay — 1,660 ms
Users could experience a delay when interacting with the page.
First Meaningful Paint — 4.4 s
The time taken for the primary content of the page to be rendered.

Other

Reduce unused JavaScript — Potential savings of 1,119 KiB
It is advised to remove unused JavaScript in order to reduce bytes consumed by network activity.
URLTransfer Size (Bytes)Potential Savings (Bytes)
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/desktop_polymer.vflset/desktop_polymer.js
1661407
698736
https://www.youtube.com/s/player/4248d311/player_ias.vflset/en_US/base.js
612046
421892
https://www.youtube.com/s/player/4248d311/player_ias.vflset/en_US/offline.js
30847
25593
Serve static assets with an efficient cache policy — 19 resources found
Youtube.com can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.
URLCache TTL (Ms)Transfer Size (Bytes)
https://i.ytimg.com/vi/jfKfPfyJRdk/hq720_live.jpg?sqp=CPCwr54G-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLBVwm58Qs25eze6n2LOGHQENrqcag
300000
39152
https://i.ytimg.com/vi/Qx7wZxMPE8I/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLA33UiQqOW-otGY4QUCbwgSrus2mw
300000
35536
https://i.ytimg.com/vi/eeNjYd72JLY/hq720_live.jpg?sqp=CPCwr54G-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLAmMHoJgScIZ5wajJic7760C2o6ew
300000
18188
https://static.doubleclick.net/instream/ad_status.js
900000
864
https://www.gstatic.com/youtube/img/promos/growth/ed7ea9be9d5d6ec28d3e1038aa31e35771529feb8ecc54788fe1bab62e354916_2560x520.jpeg
3000000
22754
https://www.gstatic.com/youtube/img/promos/growth/864dc47e45a7a0b06602f73155980de282b939a6d0adc7bdcda231f965bf796a_640x48.png
3000000
12325
https://i.ytimg.com/vi/n5zNdiQEtrQ/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLAWpXs6lMUjprF21-P9_QxoSTRfOw
7200000
92925
https://i.ytimg.com/vi/xAqu4ogdp4Y/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLAH8D4sXU3Dpg9yxUVuFPb4ynmA9A
7200000
63453
https://i.ytimg.com/vi/CJ2AH3LJeic/hq720.jpg?sqp=-oaymwE2CNAFEJQDSFXyq4qpAygIARUAAIhCGAFwAcABBvABAfgB_gmAAtAFigIMCAAQARhyIFQoPzAP&rs=AOn4CLBFaEZdHKtKWH-C36hRukNp5nngGQ
7200000
43915
https://i.ytimg.com/vi/_Rks2oCRS88/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLDf4Dpz89e82Nvv5TXKrohtTJA4fw
7200000
41638
https://i.ytimg.com/vi/6Ij9PiehENA/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLAkbqT0YziQSzkFlTf5YhdJHsMyiw
7200000
15814
https://yt3.ggpht.com/ytc/AMLnZu9grnfIzmQUrS0u5CYtZdab7ybvpvUo7HwYcKDX2w=s68-c-k-c0x00ffffff-no-rj
86400000
5054
https://yt3.ggpht.com/ytc/AMLnZu_hprZ-tNNRtJk12zsOOowLRYaQa0YwKtaNDuhu0A=s88-c-k-c0x00ffffff-no-rj
86400000
4925
https://yt3.ggpht.com/KNYElmLFGAOSZoBmxYGKKXhGHrT2e7Hmz3WsBerbam5uaDXFADAmT7htj3OcC-uK1O88lC9fQg=s68-c-k-c0x00ffffff-no-rj
86400000
4702
https://yt3.ggpht.com/ytc/AMLnZu_pmZyWJhTKDAI4gHXQK1Y2AiTp6WfvIJ8syslwYA=s68-c-k-c0x00ffffff-no-rj
86400000
4601
https://yt3.ggpht.com/ytc/AMLnZu_HtwMgEDPHCoQoobS_gyarjN3jPbzEfZXTsQJv=s68-c-k-c0x00ffffff-no-rj
86400000
4265
https://yt3.ggpht.com/ytc/AMLnZu8fIT4MTyobgM_deRkvcWBMIhKpAeIGfgqqob5p=s68-c-k-c0x00ffffff-no-rj
86400000
3617
https://yt3.ggpht.com/-Z9-8HaiNm83Me5l_jqMXmCNWSuTxTFG_3S5GEjuzikPaP3zMuUyAzfUAWqJOpgp2ut4-2-ltg=s68-c-k-c0x00ffffff-no-rj
86400000
3023
https://yt3.ggpht.com/ytc/AMLnZu9a6wmBXHHW48ZOYrIb__apvgZAZ6qxQFB11e124w=s68-c-k-c0x00ffffff-no-rj
86400000
1485
Avoid an excessive DOM size — 8,800 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.
StatisticElementValue
Total DOM Elements
8800
Maximum DOM Depth
30
Maximum Child Elements
425
Reduce JavaScript execution time — 4.9 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
URLTotal CPU Time (Ms)Script Evaluation (Ms)Script Parse (Ms)
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/desktop_polymer.vflset/desktop_polymer.js
3947.669
2697.418
160.617
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/web-animations-next-lite.min.vflset/web-animations-next-lite.min.js
1397.018
1145.751
1.271
https://www.youtube.com/
497.942
231.697
41.546
https://www.youtube.com/s/player/4248d311/player_ias.vflset/en_US/base.js
496.64
444.745
39.013
Unattributable
252.922
4.325
0
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/spf.vflset/spf.js
180.306
176.308
1.939
Minimize main-thread work — 6.8 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
CategoryTime Spent (Ms)
Script Evaluation
4739.628
Parse HTML & CSS
719.427
Style & Layout
454.161
Garbage Collection
282.97
Other
279.709
Script Parsing & Compilation
251.615
Rendering
105.269
Does not use passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
Source
Image elements do not have explicit `width` and `height`
Reduce layout shifts and improve CLS by setting explicit width and height properties on image elements.
URL
https://www.gstatic.com/youtube/img/promos/growth/864dc47e45a7a0b06602f73155980de282b939a6d0adc7bdcda231f965bf796a_640x48.png
https://yt3.ggpht.com/ytc/AMLnZu_hprZ-tNNRtJk12zsOOowLRYaQa0YwKtaNDuhu0A=s88-c-k-c0x00ffffff-no-rj
https://yt3.ggpht.com/ytc/AMLnZu_HtwMgEDPHCoQoobS_gyarjN3jPbzEfZXTsQJv=s68-c-k-c0x00ffffff-no-rj
https://yt3.ggpht.com/ytc/AMLnZu8fIT4MTyobgM_deRkvcWBMIhKpAeIGfgqqob5p=s68-c-k-c0x00ffffff-no-rj
https://yt3.ggpht.com/KNYElmLFGAOSZoBmxYGKKXhGHrT2e7Hmz3WsBerbam5uaDXFADAmT7htj3OcC-uK1O88lC9fQg=s68-c-k-c0x00ffffff-no-rj
https://yt3.ggpht.com/-Z9-8HaiNm83Me5l_jqMXmCNWSuTxTFG_3S5GEjuzikPaP3zMuUyAzfUAWqJOpgp2ut4-2-ltg=s68-c-k-c0x00ffffff-no-rj
https://yt3.ggpht.com/ytc/AMLnZu_pmZyWJhTKDAI4gHXQK1Y2AiTp6WfvIJ8syslwYA=s68-c-k-c0x00ffffff-no-rj
https://yt3.ggpht.com/ytc/AMLnZu9a6wmBXHHW48ZOYrIb__apvgZAZ6qxQFB11e124w=s68-c-k-c0x00ffffff-no-rj
https://yt3.ggpht.com/ytc/AMLnZu9grnfIzmQUrS0u5CYtZdab7ybvpvUo7HwYcKDX2w=s68-c-k-c0x00ffffff-no-rj
Does not have a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of youtube.com on mobile screens.
Registers an `unload` listener
The 'unload' event does not fire reliably, causing issues with browser optimizations such as the Back-Forward Cache. It is recommended that 'pagehide' or 'visibilitychange' events are used instead.
Source
87

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of youtube.com. This includes details about various page attributes that can be optimized.

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.
The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.
No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`button`, `link`, and `menuitem` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.
`[aria-hidden="true"]` is not present on the document `<body>`
If aria-hidden=true is set on the document body, assistive technologies, like a screen reader will work inconsistently.
`[aria-hidden="true"]` elements do not contain focusable descendents
Interactive elements within an aria-hidden=true element are unavailable to users of assistive technologies, like a screen reader.
ARIA input fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when an input field does not have an accessible name specified.
ARIA `meter` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.
ARIA `progressbar` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.
`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.
`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.
`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.
ARIA toggle fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when a toggle field does not have an accessible name specified.
ARIA `treeitem` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.
`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.
`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.
ARIA IDs are unique
Ensure all ARIA ID values are unique to prevent elements from being overlooked by assistive technologies, like a screen reader.

Names and labels

Buttons have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.
Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
No form fields have multiple labels
Having multiple labels for form fields can be confusing to assistive technologies, like a screen reader.
`<frame>` or `<iframe>` elements have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
Form elements have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
Links have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.
`<object>` elements have alternate text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.
Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Internationalization and localization

`<html>` element has a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.
`<html>` element has a valid value for its `[lang]` attribute
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.
`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
Youtube.com may provide assistance to deaf or hearing-impaired users with captions on videos.

ARIA

`[aria-*]` attributes do not match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.
Failing Elements
ARIA `tooltip` elements do not have accessible names.
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.
Failing Elements

Contrast

Background and foreground colors do not have a sufficient contrast ratio.
Many (if not most) users find low-contrast text difficult or impossible to read.
Failing Elements

Navigation

Heading elements are not in a sequentially-descending order
Properly order all headers and do not skip heading levels to better the navigation and readability for users of assistive technologies, like a screen reader.
Failing Elements

Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.
Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.
Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.
The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.
User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.
Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.
Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.
Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.
Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.
HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.
75

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that youtube.com should incorporate. This includes practices such as protecting pages with HTTPS.

Audits

Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids front-end JavaScript libraries with known security vulnerabilities
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.
Ensure CSP is effective against XSS attacks
Significantly reduce the risk of cross-site scripting attacks (XSS) by ensuring you have a strong Content Security Policy (CSP).
DescriptionDirectiveSeverity
No CSP found in enforcement mode
High

Audits

Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.
Displays images with correct aspect ratio
Ensure that image display dimensions match their natural aspect ratio.
Serves images with appropriate resolution
For maximum image clarity, ensure images have natural dimensions and are proportional to the display size and pixel ratio.
Fonts with `font-display: optional` are preloaded
It is recommended that optional fonts are preloaded.

Audits

Page has the HTML doctype
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.
Properly defines charset
It is advised to declare a character encoding, optionally via a <meta> tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header.

Audits

Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
NameVersion
Polymer
3.5.0
Hammer.js
2.0.2
SPF
No issues in the `Issues` panel in Chrome Devtools
There may be unresolved issues logged to Chrome Devtools.

Audits

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URLRequest Resolution
http://youtube.com/
Allowed

Audits

Uses deprecated APIs — 1 warning found
Avoid deprecated APIs which will eventually be removed the browser.
Deprecation / WarningSource
`Event.path` is deprecated and will be removed. Please use `Event.composedPath()` instead.
Browser errors were logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.
SourceDescription
Refused to display 'https://accounts.google.com/' in a frame because it set 'X-Frame-Options' to 'deny'.
Missing source maps for large first-party JavaScript
Consider deploying source maps for added benefits such as the ability to debug while in production.
URLMap URL
https://www.youtube.com/s/player/4248d311/player_ias.vflset/en_US/base.js
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/desktop_polymer.vflset/desktop_polymer.js
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/webcomponents-sd.vflset/webcomponents-sd.js
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/webcomponents-sd.vflset/blaze-out/k8-opt/bin/third_party/javascript/polymer/v2/webcomponentsjs/webcomponents-sd.js.sourcemap
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/web-animations-next-lite.min.vflset/web-animations-next-lite.min.js
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/web-animations-next-lite.min.vflset/web-animations-next-lite.min.js.map
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/custom-elements-es5-adapter.vflset/custom-elements-es5-adapter.js
https://www.youtube.com/s/desktop/82a4cf4f/jsbin/custom-elements-es5-adapter.vflset/blaze-out/k8-opt/bin/third_party/javascript/custom_elements/fast-shim.js.sourcemap
https://www.google.com/js/th/Bdw2VvWHBnLyaZnICW60B-ZF7DgMaGaXgSsIEsc-hUM.js
75

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for youtube.com. This includes optimizations such as providing meta data.

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
Document has a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.
Document has a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.
Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.
Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.
robots.txt is valid
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.

Mobile Friendly

Document uses legible font sizes
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.
Tap targets are sized appropriately
Interactive elements (such as buttons and links) should be appropriately spaced, sized and easy enough to select or tap with regard to their surrounding elements.

Mobile Friendly

Does not have a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of youtube.com on mobile screens.

Content Best Practices

Links do not have descriptive text — 1 link found
Make use of descriptive link text to assist search engines in understanding the content.

Crawling and Indexing

Manual Checks

Structured data is valid
Structured data can be validated through the use of the Structured Data Testing Tool and the Structured Data Linter.
44

PWA

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of youtube.com. This includes details about web app manifests.

Installable

Web app manifest and service worker meet the installability requirements
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.

PWA Optimized

Registers a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.
Configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Content is sized correctly for the viewport
Ensure that the width of the app's content matches the width of the viewport, otherwise the app might not be optimized for mobile screens.

PWA Optimized

Does not set a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data
Does not have a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of youtube.com on mobile screens.
Does not provide a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.
Manifest doesn't have a maskable icon
Maskable icons are great to ensure that images fill the entire shape when installing the app on a device.

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.
Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.
Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.
Avg. (All Categories) 61
Performance 24
Accessibility 82
Best Practices 83
SEO 84
PWA 30
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
URL: https://m.youtube.com/
Updated: 21st January, 2023

2.54 seconds
First Contentful Paint (FCP)
50%
33%
17%

0.02 seconds
First Input Delay (FID)
90%
6%
4%

Simulate loading on mobile
24

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for youtube.com. This includes details about optimizing page load times which can result in a better user experience.

Metrics

Cumulative Layout Shift — 0
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data

Other

Properly size images
Images can slow down the page's load time. Youtube.com should consider serving more appropriate-sized images.
Defer offscreen images — Potential savings of 4 KiB
Time to Interactive can be slowed down by resources on the page. Youtube.com should consider lazy-loading offscreen and hidden images.
URLResource Size (Bytes)Potential Savings (Bytes)
3800
3800
Minify CSS
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Youtube.com should consider minifying CSS files.
Minify JavaScript
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Youtube.com should consider minifying JS files.
Efficiently encode images
Unoptimized images can consume more cellular data than what is necessary.
Serve images in next-gen formats
Consider JPEG 2000, JPEG XR or WebP image formats which provide better compression than PNG and JPEG.
Enable text compression
Text-based resources should be served with compression, such as gzip, deflate or brotli.
Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.
Initial server response time was short — Root document took 560 ms
It is advised to keep the server response time short for the main document, because all other requests depend on it.
URLTime Spent (Ms)
https://m.youtube.com/
560.158
Preload key requests
Key requests can be preloaded by using '<link rel=preload>'. Youtube.com should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.
Remove duplicate modules in JavaScript bundles
Ensure that no duplicate JavaScript modules from bundles exist to reduce bytes consumed by network activity.
Avoid serving legacy JavaScript to modern browsers
Polyfills and transforms enable legacy browsers to use new JavaScript features. For bundled JavaScript it is recommended to adopt a modern script deployment strategy using module/nomodule feature detection. This will reduce the amount of code shipped to modern browsers.
Avoids enormous network payloads — Total size was 1,138 KiB
Large network payloads can cost users money and are linked to long load times.
URLTransfer Size (Bytes)
https://m.youtube.com/s/player/4248d311/player-plasma-ias-phone-en_US.vflset/base.js
378954
https://m.youtube.com/s/_/ytmweb/_/js/k=ytmweb.c3_base.en_US.Uih2xhEqxLM.O/am=SBA/d=1/br=1/rs=ABnK5FJbsnp-PTNt798JeoH9sTv718Z5lQ/m=c3_base
274095
https://accounts.google.com/v3/signin/identifier?dsh=S-2013157771%3A1674303752490002&continue=https%3A%2F%2Fm.youtube.com%2Fsignin%3Faction_handle_signin%3Dtrue%26app%3Dm%26hl%3Den%26next%3D%252Fsignin_passive%26feature%3Dmobile_passive%26noapp%3D1&hl=en&ltmpl=mobile&passive=true&service=youtube&uilel=3&flowName=GlifWebSignIn&flowEntry=ServiceLogin&ifkv=AWnogHeXMKkRfPMqARcMTxXtDD7oIEr4elIEjozCPRU6kJM1PAz51gZYgMr0S4ZtmM3aFDLuC2rpZg
91039
https://m.youtube.com/s/_/ytmweb/_/ss/k=ytmweb.c3_base.kNmGQpfmAXg.L.W.O/am=SBCQAw/d=0/br=1/rs=ABnK5FLCKnbdh3uAoh4OtOK3bb3bUuitbA
56637
https://m.youtube.com/s/player/4248d311/mobile-polymer-player-svg-ias-mweb.css
54071
https://m.youtube.com/
38416
https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/Create
31460
https://m.youtube.com/s/_/ytmweb/_/js/k=ytmweb.c3_base.en_US.Uih2xhEqxLM.O/am=SBA/d=1/exm=Rv3e3d,c3_base/ed=1/br=1/rs=ABnK5FJbsnp-PTNt798JeoH9sTv718Z5lQ/m=aDST8c,oKKiDe,W8Xq9b,SomnJf,xKfhhd,tLUXsc
24026
https://i.ytimg.com/vi/UQ-LWO-lyDs/hq720.jpg?sqp=-oaymwEcCK4FEIIDSEbyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLCXKmxqWtobsIhbAYRaSGcdyyUfYA
23643
https://i.ytimg.com/vi/o4Dn0pbV9SE/hq720_2.jpg?sqp=-oaymwEdCJUDENAFSEbyq4qpAw8IARUAAIhCcAHAAQbQAQE=&rs=AOn4CLDuQ6RpaYnaLJ0ZbTMsVHzz8Onpgg
22261
Avoids an excessive DOM size — 577 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.
StatisticElementValue
Total DOM Elements
577
Maximum DOM Depth
20
Maximum Child Elements
23
Avoid chaining critical requests — 6 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Youtube.com should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
User Timing marks and measures — 11 user timings
Make use of the User Timing API to measure an app's real-world performance during key user experiences.
NameTypeStart Time (Ms)Duration (Ms)
mark_rsef_dpj
Mark
889.697
mark_pdc
Mark
904.478
mark_pdr
Mark
917.16
mark_pr
Mark
919.66
mark_pe
Mark
1403.094
mark_pot_isc
Mark
1435.929
mark_fs
Mark
1450.142
mark_pot_ist
Mark
1514.778
mark_pot_if
Mark
1778.583
mark_pot_cms
Mark
1779.19
mark_pot_cmf
Mark
1780.573
All text remains visible during webfont loads
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.
Keep request counts low and transfer sizes small — 42 requests • 1,138 KiB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.
Resource TypeRequestsTransfer Size (Bytes)
Total
42
1165000
Script
9
726911
Document
2
129455
Stylesheet
2
110708
Image
6
78710
Other
17
59118
Font
2
30665
Media
4
29433
Third-party
17
253549
Minimize third-party usage — Third-party code blocked the main thread for 0 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.
Third-PartyTransfer Size (Bytes)Main-Thread Blocking Time (Ms)
108082
0
30665
0
2767
0
Lazy load third-party resources with facades
Consider replacing third-party embeds with a facade until they are required (use lazy loading).
Largest Contentful Paint element — 1 element found
The element which was identified as the Largest Contentful Paint.
Element
Largest Contentful Paint image was not lazily loaded
Above-the-fold images that are lazily loaded render later in the page lifecycle, which can delay the largest contentful paint.
Element
Avoid large layout shifts
Below is a list of all DOM elements that contribute to the CLS of the page.
Avoids `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.
Avoid long main-thread tasks — 13 long tasks found
Below is a list of the longest tasks on the main thread, which is useful when identifying the worst input delay contributors.
URLStart Time (Ms)Duration (Ms)
https://m.youtube.com/s/player/4248d311/player-plasma-ias-phone-en_US.vflset/base.js
12646
444
https://m.youtube.com/s/player/4248d311/player-plasma-ias-phone-en_US.vflset/base.js
12124
431
https://m.youtube.com/s/_/ytmweb/_/js/k=ytmweb.c3_base.en_US.Uih2xhEqxLM.O/am=SBA/d=1/br=1/rs=ABnK5FJbsnp-PTNt798JeoH9sTv718Z5lQ/m=c3_base
5970
412
https://m.youtube.com/s/_/ytmweb/_/js/k=ytmweb.c3_base.en_US.Uih2xhEqxLM.O/am=SBA/d=1/br=1/rs=ABnK5FJbsnp-PTNt798JeoH9sTv718Z5lQ/m=c3_base
11130
346
https://m.youtube.com/s/player/4248d311/player-plasma-ias-phone-en_US.vflset/base.js
10920
209
https://m.youtube.com/
6472
197
https://m.youtube.com/s/_/ytmweb/_/js/k=ytmweb.c3_base.en_US.Uih2xhEqxLM.O/am=SBA/d=1/br=1/rs=ABnK5FJbsnp-PTNt798JeoH9sTv718Z5lQ/m=c3_base
6671
137
https://m.youtube.com/s/_/ytmweb/_/js/k=ytmweb.c3_base.en_US.Uih2xhEqxLM.O/am=SBA/d=1/exm=Rv3e3d,SomnJf,W8Xq9b,aDST8c,c3_base,oKKiDe,tLUXsc,xKfhhd/ed=1/br=1/rs=ABnK5FJbsnp-PTNt798JeoH9sTv718Z5lQ/m=ERsVff
8370
116
https://m.youtube.com/s/_/ytmweb/_/js/k=ytmweb.c3_base.en_US.Uih2xhEqxLM.O/am=SBA/d=1/exm=Rv3e3d,c3_base/ed=1/br=1/rs=ABnK5FJbsnp-PTNt798JeoH9sTv718Z5lQ/m=aDST8c,oKKiDe,W8Xq9b,SomnJf,xKfhhd,tLUXsc
8070
107
https://m.youtube.com/static/r/a7c40ab4/scheduler.vflset/scheduler.js
6382
90
Unattributable
2892
69
https://m.youtube.com/
2820
61
https://m.youtube.com/s/_/ytmweb/_/js/k=ytmweb.c3_base.en_US.Uih2xhEqxLM.O/am=SBA/d=1/br=1/rs=ABnK5FJbsnp-PTNt798JeoH9sTv718Z5lQ/m=c3_base
6855
56
Avoid non-composited animations
It is recommended to avoid non-composited animations which are often janky and increase CLS.
Image elements have explicit `width` and `height`
Reduce layout shifts and improve CLS by setting explicit width and height properties on image elements.
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of youtube.com on mobile screens.

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.
Timing budget
It is advised to set a timing budget to monitor the performance of your site.

Audits

Network Requests
Below is a list of network requests that were made during page load.
URLProtocolStart Time (Ms)End Time (Ms)Transfer Size (Bytes)Resource Size (Bytes)Status CodeMIME TypeResource Type
http://youtube.com/
http/1.1
0
28.087999962736
415
0
301
application/binary
https://youtube.com/
http/1.1
28.470999968704
56.1180000077
1047
0
301
application/binary
https://www.youtube.com/
http/1.1
56.555999966804
78.052999975625
1032
0
302
application/binary
https://m.youtube.com/
h2
78.567999997176
637.73199997377
38416
256314
200
text/html
Document
https://m.youtube.com/static/r/a7c40ab4/scheduler.vflset/scheduler.js
h2
651.52000001399
657.55599999102
3408
6750
200
text/javascript
Script
https://m.youtube.com/static/r/a7c40ab4/fetch_polyfill.vflset/fetch_polyfill.js
h2
651.8100000103
658.20000000531
3582
9615
200
text/javascript
Script
https://m.youtube.com/s/_/ytmweb/_/js/k=ytmweb.c3_base.en_US.Uih2xhEqxLM.O/am=SBA/d=1/br=1/rs=ABnK5FJbsnp-PTNt798JeoH9sTv718Z5lQ/m=c3_base
h2
652.19200000865
671.69400001876
274095
920508
200
text/javascript
Script
https://m.youtube.com/s/_/ytmweb/_/ss/k=ytmweb.c3_base.kNmGQpfmAXg.L.W.O/am=SBCQAw/d=0/br=1/rs=ABnK5FLCKnbdh3uAoh4OtOK3bb3bUuitbA
h2
652.51499996521
681.67499999981
56637
463554
200
text/css
Stylesheet
data
668.51200000383
668.7099999981
0
3800
200
image/png
Image
https://fonts.gstatic.com/s/roboto/v18/KFOmCnqEu92Fr1Mu4mxPKTU1Kg.ttf
h2
676.00400000811
679.54799998552
15326
20864
200
font/ttf
Font
https://fonts.gstatic.com/s/roboto/v18/KFOlCnqEu92Fr1MmEU9fBBc9AMP6lQ.ttf
h2
676.14300001878
679.98999997508
15339
20860
200
font/ttf
Font
https://m.youtube.com/s/_/ytmweb/_/js/k=ytmweb.c3_base.en_US.Uih2xhEqxLM.O/am=SBA/d=1/exm=c3_base/ed=1/br=1/rs=ABnK5FJbsnp-PTNt798JeoH9sTv718Z5lQ/m=Rv3e3d
h2
852.2079999675
858.07600000408
15749
52698
200
text/javascript
Script
https://accounts.google.com/ServiceLogin?ltmpl=mobile&service=youtube&uilel=3&passive=true&continue=https%3A%2F%2Fm.youtube.com%2Fsignin%3Faction_handle_signin%3Dtrue%26app%3Dm%26hl%3Den%26next%3D%252Fsignin_passive%26feature%3Dmobile_passive%26noapp%3D1&hl=en
http/1.1
904.93899997091
935.76799996663
1757
0
302
text/html
https://accounts.google.com/v3/signin/identifier?dsh=S-2013157771%3A1674303752490002&continue=https%3A%2F%2Fm.youtube.com%2Fsignin%3Faction_handle_signin%3Dtrue%26app%3Dm%26hl%3Den%26next%3D%252Fsignin_passive%26feature%3Dmobile_passive%26noapp%3D1&hl=en&ltmpl=mobile&passive=true&service=youtube&uilel=3&flowName=GlifWebSignIn&flowEntry=ServiceLogin&ifkv=AWnogHeXMKkRfPMqARcMTxXtDD7oIEr4elIEjozCPRU6kJM1PAz51gZYgMr0S4ZtmM3aFDLuC2rpZg
h2
936.30200001644
1050.700999971
91039
0
200
text/html
Document
https://m.youtube.com/youtubei/v1/guide?key=AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8&prettyPrint=false
h2
1011.708999984
1036.7049999768
2946
9771
200
application/json
Fetch
https://m.youtube.com/s/search/audio/failure.mp3
http/1.1
1036.3660000148
1056.7039999878
511
0
302
text/html
https://m.youtube.com/s/search/audio/no_input.mp3
http/1.1
1037.295999995
1045.318999968
497
0
302
text/html
https://m.youtube.com/s/search/audio/open.mp3
http/1.1
1037.7049999661
1057.1479999926
503
0
302
text/html
https://m.youtube.com/s/search/audio/success.mp3
http/1.1
1038.0139999907
1057.4630000046
521
0
302
text/html
https://m.youtube.com/s/_/ytmweb/_/js/k=ytmweb.c3_base.en_US.Uih2xhEqxLM.O/am=SBA/d=1/exm=Rv3e3d,c3_base/ed=1/br=1/rs=ABnK5FJbsnp-PTNt798JeoH9sTv718Z5lQ/m=aDST8c,oKKiDe,W8Xq9b,SomnJf,xKfhhd,tLUXsc
h2
1042.2510000062
1049.0349999745
24026
85983
200
text/javascript
Script
https://www.youtube.com/s/search/audio/no_input.mp3
h2
1049.4009999675
1056.0589999659
7740
6953
206
audio/mpeg
Media
https://www.youtube.com/s/search/audio/failure.mp3
h2
1057.4930000002
1062.0740000159
7316
6529
206
audio/mpeg
Media
https://www.youtube.com/s/search/audio/open.mp3
h2
1057.7069999999
1065.9899999737
6954
6167
206
audio/mpeg
Media
https://www.youtube.com/s/search/audio/success.mp3
h2
1057.8610000084
1062.4959999695
7423
6636
206
audio/mpeg
Media
https://m.youtube.com/s/_/ytmweb/_/js/k=ytmweb.c3_base.en_US.Uih2xhEqxLM.O/am=SBA/d=1/exm=Rv3e3d,SomnJf,W8Xq9b,aDST8c,c3_base,oKKiDe,tLUXsc,xKfhhd/ed=1/br=1/rs=ABnK5FJbsnp-PTNt798JeoH9sTv718Z5lQ/m=ERsVff
h2
1080.5009999895
1088.9270000043
10946
37173
200
text/javascript
Script
https://i.ytimg.com/vi/XRs7WRqQDlQ/hq720_2.jpg?sqp=-oaymwEdCJUDENAFSEbyq4qpAw8IARUAAIhCcAHAAQbQAQE=&rs=AOn4CLBBmbu93pvKqXK5TMoR32YAyGLAUw
h2
1169.8479999905
1175.0650000176
11746
10996
200
image/webp
Image
https://i.ytimg.com/vi/o4Dn0pbV9SE/hq720_2.jpg?sqp=-oaymwEdCJUDENAFSEbyq4qpAw8IARUAAIhCcAHAAQbQAQE=&rs=AOn4CLDuQ6RpaYnaLJ0ZbTMsVHzz8Onpgg
h2
1169.9890000164
1174.7529999702
22261
21520
200
image/webp
Image
https://i.ytimg.com/vi/f5ksIepT2mE/hq720_2.jpg?sqp=-oaymwEdCJUDENAFSEbyq4qpAw8IARUAAIhCcAHAAQbQAQE=&rs=AOn4CLBT3n-wDR6D3Pp5eqAbAP9KEaWd7A
h2
1170.1340000145
1175.344999996
16517
15776
200
image/webp
Image
https://i.ytimg.com/vi/UQ-LWO-lyDs/hq720.jpg?sqp=-oaymwEcCK4FEIIDSEbyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLCXKmxqWtobsIhbAYRaSGcdyyUfYA
h2
1170.5479999655
1175.7750000106
23643
22896
200
image/webp
Image
https://yt3.ggpht.com/ytc/AMLnZu9ILT0tAaCMP9GI24EcKWdQZE6KWmHuvp9DELxx=s68-c-k-c0x00ffffff-no-rj
h2
1170.6479999702
1180.9260000009
4275
3661
200
image/jpeg
Image
https://googleads.g.doubleclick.net/pagead/id
http/1.1
1179.4989999617
1233.3719999879
911
0
302
text/html
https://googleads.g.doubleclick.net/pagead/id?slf_rd=1
h2
1233.6149999755
1238.6960000149
991
100
200
application/json
XHR
https://m.youtube.com/s/player/4248d311/player-plasma-ias-phone-en_US.vflset/base.js
h2
1250.1809999812
1271.2000000174
378954
1228512
200
text/javascript
Script
https://m.youtube.com/s/player/4248d311/mobile-polymer-player-svg-ias-mweb.css
h2
1251.0989999864
1279.8109999858
54071
390972
200
text/css
Stylesheet
https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/Create
h2
1518.8479999779
1523.6649999861
673
0
200
text/html
Preflight
https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/Create
h2
1524.0500000073
1545.3569999663
31460
67021
200
application/json+protobuf
XHR
https://static.doubleclick.net/instream/ad_status.js
h2
1522.2530000028
1525.1960000023
865
29
200
text/javascript
Script
https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateIT
h2
1759.6879999619
1766.3130000001
673
0
200
text/html
Preflight
https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateIT
h2
1766.9779999997
1775.244999968
787
94
200
application/json+protobuf
XHR
https://m.youtube.com/youtubei/v1/att/get?key=AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8&prettyPrint=false
h2
2529.0030000033
2559.047000017
13886
18691
200
application/json
XHR
https://www.google.com/js/th/Bdw2VvWHBnLyaZnICW60B-ZF7DgMaGaXgSsIEsc-hUM.js
h2
2562.901999976
2567.6729999832
15286
37142
200
text/javascript
Script
https://m.youtube.com/generate_204?T8GlLg
h2
2797.7599999867
2806.2439999776
268
0
204
text/plain
Image
https://m.youtube.com/youtubei/v1/log_event?alt=json&key=AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8
h2
3266.8059999705
3290.204000019
508
28
200
application/json
XHR
Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.
Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.
Tasks
Below is a list of the top-level main thread tasks that executed during page load.
Start Time (Ms)End Time (Ms)
642.133
15.157
665.741
11.726
677.479
5.707
754.893
7.036
761.938
102.897
864.87
22.576
889.245
49.2
938.908
9.883
954.098
34.358
991.435
21.52
1018.526
17.208
1049.1
8.397
1059.493
9.811
1079.228
53.557
1132.911
5.578
1138.582
23.605
1167.959
5.26
1173.899
28.939
1205.038
28.081
1281.636
10.745
1294
7.423
1351.312
6.189
1357.56
52.208
1412.362
86.551
1511.386
12.043
1546.824
215.398
2520.214
10.268
2570.822
6.747
2577.794
222.018
3256.106
5.23
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data
Script Treemap Data
Provide as required, for treemap app.

Other

Serve static assets with an efficient cache policy — 6 resources found
Youtube.com can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.
URLCache TTL (Ms)Transfer Size (Bytes)
https://static.doubleclick.net/instream/ad_status.js
900000
865
https://i.ytimg.com/vi/UQ-LWO-lyDs/hq720.jpg?sqp=-oaymwEcCK4FEIIDSEbyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLCXKmxqWtobsIhbAYRaSGcdyyUfYA
7200000
23643
https://i.ytimg.com/vi/o4Dn0pbV9SE/hq720_2.jpg?sqp=-oaymwEdCJUDENAFSEbyq4qpAw8IARUAAIhCcAHAAQbQAQE=&rs=AOn4CLDuQ6RpaYnaLJ0ZbTMsVHzz8Onpgg
7200000
22261
https://i.ytimg.com/vi/f5ksIepT2mE/hq720_2.jpg?sqp=-oaymwEdCJUDENAFSEbyq4qpAw8IARUAAIhCcAHAAQbQAQE=&rs=AOn4CLBT3n-wDR6D3Pp5eqAbAP9KEaWd7A
7200000
16517
https://i.ytimg.com/vi/XRs7WRqQDlQ/hq720_2.jpg?sqp=-oaymwEdCJUDENAFSEbyq4qpAw8IARUAAIhCcAHAAQbQAQE=&rs=AOn4CLBBmbu93pvKqXK5TMoR32YAyGLAUw
7200000
11746
https://yt3.ggpht.com/ytc/AMLnZu9ILT0tAaCMP9GI24EcKWdQZE6KWmHuvp9DELxx=s68-c-k-c0x00ffffff-no-rj
86400000
4275

Metrics

First Contentful Paint — 5.9 s
The time taken for the first image or text on the page to be rendered.
Time to Interactive — 12.4 s
The time taken for the page to become fully interactive.
Speed Index — 7.5 s
The time taken for the page contents to be visibly populated.
Total Blocking Time — 1,610 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).
Largest Contentful Paint — 7.7 s
The timing of the largest text or image that is painted.

Audits

Max Potential First Input Delay — 440 ms
Users could experience a delay when interacting with the page.
First Meaningful Paint — 6.7 s
The time taken for the primary content of the page to be rendered.

Other

Eliminate render-blocking resources — Potential savings of 950 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. Youtube.com should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.
URLTransfer Size (Bytes)Potential Savings (Ms)
https://m.youtube.com/s/_/ytmweb/_/ss/k=ytmweb.c3_base.kNmGQpfmAXg.L.W.O/am=SBCQAw/d=0/br=1/rs=ABnK5FLCKnbdh3uAoh4OtOK3bb3bUuitbA
56637
900
https://m.youtube.com/static/r/a7c40ab4/scheduler.vflset/scheduler.js
3408
150
Reduce unused CSS — Potential savings of 106 KiB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Youtube.com should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.
URLTransfer Size (Bytes)Potential Savings (Bytes)
https://m.youtube.com/s/_/ytmweb/_/ss/k=ytmweb.c3_base.kNmGQpfmAXg.L.W.O/am=SBCQAw/d=0/br=1/rs=ABnK5FLCKnbdh3uAoh4OtOK3bb3bUuitbA
56637
54571
https://m.youtube.com/s/player/4248d311/mobile-polymer-player-svg-ias-mweb.css
54071
54022
Reduce unused JavaScript — Potential savings of 384 KiB
It is advised to remove unused JavaScript in order to reduce bytes consumed by network activity.
URLTransfer Size (Bytes)Potential Savings (Bytes)
https://m.youtube.com/s/player/4248d311/player-plasma-ias-phone-en_US.vflset/base.js
378954
244635
https://m.youtube.com/s/_/ytmweb/_/js/k=ytmweb.c3_base.en_US.Uih2xhEqxLM.O/am=SBA/d=1/br=1/rs=ABnK5FJbsnp-PTNt798JeoH9sTv718Z5lQ/m=c3_base
274095
148475
Avoid multiple page redirects — Potential savings of 1,890 ms
Redirects can cause additional delays before the page can begin loading. Youtube.com should avoid multiple or unnecessary page redirects.
URLTime Spent (Ms)
http://youtube.com/
630
https://youtube.com/
480
https://www.youtube.com/
780
https://m.youtube.com/
0
Preload Largest Contentful Paint image — Potential savings of 1,830 ms
It is recommended to preload images used by LCP elements, to improve LCP time.
URLPotential Savings (Ms)
https://i.ytimg.com/vi/UQ-LWO-lyDs/hq720.jpg?sqp=-oaymwEcCK4FEIIDSEbyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLCXKmxqWtobsIhbAYRaSGcdyyUfYA
1830
Reduce JavaScript execution time — 3.8 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
URLTotal CPU Time (Ms)Script Evaluation (Ms)Script Parse (Ms)
https://m.youtube.com/s/player/4248d311/player-plasma-ias-phone-en_US.vflset/base.js
2038.216
1821.948
99.984
https://m.youtube.com/s/_/ytmweb/_/js/k=ytmweb.c3_base.en_US.Uih2xhEqxLM.O/am=SBA/d=1/br=1/rs=ABnK5FJbsnp-PTNt798JeoH9sTv718Z5lQ/m=c3_base
1380.276
1074.82
89.524
https://m.youtube.com/
614.792
200.128
43.288
Unattributable
381.688
8.664
0
https://m.youtube.com/s/_/ytmweb/_/js/k=ytmweb.c3_base.en_US.Uih2xhEqxLM.O/am=SBA/d=1/exm=Rv3e3d,c3_base/ed=1/br=1/rs=ABnK5FJbsnp-PTNt798JeoH9sTv718Z5lQ/m=aDST8c,oKKiDe,W8Xq9b,SomnJf,xKfhhd,tLUXsc
214.48
203.808
7.588
https://m.youtube.com/s/_/ytmweb/_/js/k=ytmweb.c3_base.en_US.Uih2xhEqxLM.O/am=SBA/d=1/exm=Rv3e3d,SomnJf,W8Xq9b,aDST8c,c3_base,oKKiDe,tLUXsc,xKfhhd/ed=1/br=1/rs=ABnK5FJbsnp-PTNt798JeoH9sTv718Z5lQ/m=ERsVff
121.716
113.836
3.464
https://m.youtube.com/static/r/a7c40ab4/scheduler.vflset/scheduler.js
112.184
105.328
1.216
https://m.youtube.com/s/_/ytmweb/_/js/k=ytmweb.c3_base.en_US.Uih2xhEqxLM.O/am=SBA/d=1/exm=c3_base/ed=1/br=1/rs=ABnK5FJbsnp-PTNt798JeoH9sTv718Z5lQ/m=Rv3e3d
86.08
69.532
5.62
Minimize main-thread work — 5.1 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
CategoryTime Spent (Ms)
Script Evaluation
3629.74
Other
640.732
Script Parsing & Compilation
260.792
Style & Layout
200.456
Parse HTML & CSS
150.796
Garbage Collection
93.18
Rendering
81.192
Does not use passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
Source
Registers an `unload` listener
The 'unload' event does not fire reliably, causing issues with browser optimizations such as the Back-Forward Cache. It is recommended that 'pagehide' or 'visibilitychange' events are used instead.
Source
First Contentful Paint (3G) — 11932 ms
The time taken for the first image or text on the page to be rendered while on a 3G network.
82

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of youtube.com. This includes details about various page attributes that can be optimized.

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.
The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.
`[id]` attributes on active, focusable elements are unique
Ensure all focusable elements have a unique id value to allow them to be visible to users of assistive technologies, like a screen reader.
Heading elements appear in a sequentially-descending order
Properly order all headers and do not skip heading levels to better the navigation and readability for users of assistive technologies, like a screen reader.
No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`button`, `link`, and `menuitem` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.
`[aria-hidden="true"]` is not present on the document `<body>`
If aria-hidden=true is set on the document body, assistive technologies, like a screen reader will work inconsistently.
ARIA input fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when an input field does not have an accessible name specified.
ARIA `meter` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.
ARIA `progressbar` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.
`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.
`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.
`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.
ARIA toggle fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when a toggle field does not have an accessible name specified.
ARIA `tooltip` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.
ARIA `treeitem` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.
`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.
`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.
ARIA IDs are unique
Ensure all ARIA ID values are unique to prevent elements from being overlooked by assistive technologies, like a screen reader.

Names and labels

Buttons have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.
Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
No form fields have multiple labels
Having multiple labels for form fields can be confusing to assistive technologies, like a screen reader.
`<frame>` or `<iframe>` elements have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
Form elements have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
Links have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.
`<object>` elements have alternate text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Contrast

Background and foreground colors have a sufficient contrast ratio
Many (if not most) users find low-contrast text difficult or impossible to read.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.
Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Internationalization and localization

`<html>` element has a valid value for its `[lang]` attribute
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.
`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
Youtube.com may provide assistance to deaf or hearing-impaired users with captions on videos.

ARIA

`[aria-*]` attributes do not match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.
Failing Elements

Internationalization and localization

`<html>` element does not have a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.
Failing Elements

Best practices

`[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.
Failing Elements

Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.
Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.
Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.
The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.
User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.
Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.
Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.
Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.
Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.
HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.
83

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that youtube.com should incorporate. This includes practices such as protecting pages with HTTPS.

Audits

Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids front-end JavaScript libraries with known security vulnerabilities
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.
Ensure CSP is effective against XSS attacks
Significantly reduce the risk of cross-site scripting attacks (XSS) by ensuring you have a strong Content Security Policy (CSP).
DescriptionDirectiveSeverity
No CSP found in enforcement mode
High

Audits

Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.
Displays images with correct aspect ratio
Ensure that image display dimensions match their natural aspect ratio.
Serves images with appropriate resolution
For maximum image clarity, ensure images have natural dimensions and are proportional to the display size and pixel ratio.
Fonts with `font-display: optional` are preloaded
It is recommended that optional fonts are preloaded.

Audits

Page has the HTML doctype
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.
Properly defines charset
It is advised to declare a character encoding, optionally via a <meta> tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header.

Audits

Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.
No issues in the `Issues` panel in Chrome Devtools
There may be unresolved issues logged to Chrome Devtools.

Audits

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URLRequest Resolution
http://youtube.com/
Allowed

Audits

Browser errors were logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.
SourceDescription
Refused to display 'https://accounts.google.com/' in a frame because it set 'X-Frame-Options' to 'deny'.
Missing source maps for large first-party JavaScript
Consider deploying source maps for added benefits such as the ability to debug while in production.
URLMap URL
https://m.youtube.com/s/player/4248d311/player-plasma-ias-phone-en_US.vflset/base.js
https://m.youtube.com/s/_/ytmweb/_/js/k=ytmweb.c3_base.en_US.Uih2xhEqxLM.O/am=SBA/d=1/br=1/rs=ABnK5FJbsnp-PTNt798JeoH9sTv718Z5lQ/m=c3_base
https://www.google.com/js/th/Bdw2VvWHBnLyaZnICW60B-ZF7DgMaGaXgSsIEsc-hUM.js
84

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for youtube.com. This includes optimizations such as providing meta data.

Mobile Friendly

Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of youtube.com on mobile screens.
Document uses legible font sizes — 99.39% legible text
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.
SourceSelector% of Page TextFont Size
ytm-pivot-bar-renderer
0.61%
11px
99.39%
≥ 12px

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
Document has a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.
Document has a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.
Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.
Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.
robots.txt is valid
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.

Mobile Friendly

Tap targets are not sized appropriately — 90% appropriately sized tap targets
Interactive elements (such as buttons and links) should be appropriately spaced, sized and easy enough to select or tap with regard to their surrounding elements.
Tap TargetSizeOverlapping Target
40x40
40x40

Content Best Practices

Links do not have descriptive text — 1 link found
Make use of descriptive link text to assist search engines in understanding the content.

Crawling and Indexing

Links are not crawlable
Ensure that the 'href' attribute of anchor elements links to the appropriate destination. This allows for more pages of the site to be discovered by search engines.

Manual Checks

Structured data is valid
Structured data can be validated through the use of the Structured Data Testing Tool and the Structured Data Linter.
30

PWA

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of youtube.com. This includes details about web app manifests.

PWA Optimized

Content is sized correctly for the viewport
Ensure that the width of the app's content matches the width of the viewport, otherwise the app might not be optimized for mobile screens.
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of youtube.com on mobile screens.

Installable

Web app manifest or service worker do not meet the installability requirements — 1 reason
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
Failure reason
No manifest was fetched

PWA Optimized

Does not register a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.
Is not configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Does not set a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data
Does not provide a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.
Manifest doesn't have a maskable icon
Maskable icons are great to ensure that images fill the entire shape when installing the app on a device.

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.
Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.
Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.
Hosting

Server Location

Server IP Address:172.253.122.190
Continent:North America
Country:United States
United States Flag
Region:
City:
Longitude:-97.822
Latitude:37.751
Currencies:USD
USN
USS
Languages:English

Web Hosting Provider

NameIP Address
Google LLC
Registration

Domain Registrant

Private Registration: No
Name:
Organization:Google LLC
Country:US
City:
State:CA
Post Code:
Email:
Phone:
Note: Registration information is derived from various sources and may be inaccurate.

Domain Registrar

NameIP Address
MarkMonitor, Inc.172.64.148.104
Security

Visitor Safety

Mature Content: Not Likely
McAfee WebAdvisor Rating: Unknown
WOT Rating:
WOT Trustworthiness:93/100
WOT Child Safety:93/100
Note: Safety information is not guaranteed.

SSL/TLS Certificate

Issued To:*.google.com
Issued By:WR2
Valid From:21st October, 2024
Valid To:13th January, 2025
Subject:CN = *.google.com
Hash:f6dbf7a7
Issuer:CN = WR2
O = Google Trust Services
S = US
Version:2
Serial Number:87272561864430324428816509445712429300
Serial Number (Hex):41A81582740B7A9009B461E71720C0F4
Valid From:21st October, 2024
Valid To:13th January, 2024
Signature Algorithm (Short Name):RSA-SHA256
Signature Algorithm (Long Name):sha256WithRSAEncryption
Authority Key Identifier:keyid:DE:1B:1E:ED:79:15:D4:3E:37:24:C3:21:BB:EC:34:39:6D:42:B2:30
Extended Key Usage:TLS Web Server Authentication
CRL Distribution Points:
Full Name:
URI:http://c.pki.goog/wr2/oQ6nyr8F0m0.crl

Certificate Policies:Policy: 2.23.140.1.2.1

Authority Information Access:OCSP - URI:http://o.pki.goog/wr2
CA Issuers - URI:http://i.pki.goog/wr2.crt

SCT List:Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : 7D:59:1E:12:E1:78:2A:7B:1C:61:67:7C:5E:FD:F8:D0:
87:5C:14:A0:4E:95:9E:B9:03:2F:D9:0E:8C:2E:79:B8
Timestamp : Oct 21 09:37:02.894 2024 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:44:02:20:22:A2:E5:4D:4D:55:CA:D7:A4:2C:56:1E:
EB:3E:C1:F5:06:6F:BC:01:44:B6:5B:D9:FE:B4:00:9D:
DB:F1:E0:17:02:20:38:52:58:43:97:61:43:C8:EA:4A:
F7:BE:EE:74:CF:8D:16:25:E0:2E:28:6F:3F:16:49:82:
28:0A:C8:8A:E4:49
Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : CF:11:56:EE:D5:2E:7C:AF:F3:87:5B:D9:69:2E:9B:E9:
1A:71:67:4A:B0:17:EC:AC:01:D2:5B:77:CE:CC:3B:08
Timestamp : Oct 21 09:37:02.906 2024 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:46:02:21:00:F2:48:27:B3:F5:28:34:02:FB:FF:75:
AC:40:5F:FA:89:F7:4C:04:EB:A7:5E:50:03:C8:FC:6F:
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B1:24:0B:25:27:CE:F3:09:98:CB:3D:3C:3A:0C:BF:B7:
A5:56:0D:FA:CE:A0:39:1E
Key Usage:Digital Signature
Basic Constraints:CA:FALSE
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DNS:*.ampproject.org.cn
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DNS:android.com
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DNS:google-analytics.com
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DNS:youtu.be
DNS:youtube.com
DNS:youtubeeducation.com
DNS:youtubekids.com
DNS:yt.be
DNS:*.google.com
Technical

DNS Lookup

A Records

HostIP AddressClassTTL
youtube.com.209.85.145.93IN300
youtube.com.209.85.145.91IN300
youtube.com.209.85.145.136IN300
youtube.com.209.85.145.190IN300

NS Records

HostNameserverClassTTL
youtube.com.ns1.google.com.IN21600
youtube.com.ns4.google.com.IN21600
youtube.com.ns2.google.com.IN21600
youtube.com.ns3.google.com.IN21600

AAAA Records

IP AddressClassTTL
2607:f8b0:4001:c1e::beIN300
2607:f8b0:4001:c1e::5bIN300
2607:f8b0:4001:c1e::88IN300
2607:f8b0:4001:c1e::5dIN300

CAA Records

DomainFlagsTagClassTTL
pki.goog0issueIN21600

MX Records

PriorityHostServerClassTTL
0youtube.com.smtp.google.com.IN300

SOA Records

Domain NamePrimary NSResponsible EmailTTL
youtube.com.ns1.google.com.dns-admin.google.com.60

TXT Records

HostValueClassTTL
youtube.com.google-site-verification=QtQWEwHWM8tHiJ4s-jJWzEQrD_fF3luPnpzNDH-Nw-wIN3600
youtube.com.v=spf1IN3600
youtube.com.facebook-domain-verification=64jdes7le4h7e7lfpi22rijygx58j1IN3600

HTTP Response Headers

HTTP-Code:HTTP/2 301
content-type:application/binary
expires:18th November, 2024
date:18th November, 2024
cache-control:private, max-age=31536000
server:ESF
x-content-type-options:nosniff
location:https://www.youtube.com/
content-length:0
x-frame-options:SAMEORIGIN
strict-transport-security:max-age=31536000; includeSubDomains; preload
report-to:{"group":"youtube_main","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/youtube_main"}]}
content-security-policy:require-trusted-types-for 'script'
permissions-policy:ch-ua-arch=*, ch-ua-bitness=*, ch-ua-full-version=*, ch-ua-full-version-list=*, ch-ua-model=*, ch-ua-wow64=*, ch-ua-form-factors=*, ch-ua-platform=*, ch-ua-platform-version=*
cross-origin-opener-policy:same-origin-allow-popups; report-to="youtube_main"
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x-xss-protection:0
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Whois Lookup

Created:15th February, 2005
Changed:14th January, 2024
Expires:15th February, 2025
Registrar:MarkMonitor, Inc.
Status:clientUpdateProhibited
clientTransferProhibited
clientDeleteProhibited
serverUpdateProhibited
serverTransferProhibited
serverDeleteProhibited
Nameservers:ns1.google.com
ns2.google.com
ns3.google.com
ns4.google.com
Owner Organization:Google LLC
Owner State:CA
Owner Country:US
Owner Email:Select Request Email Form at https://domains.markmonitor.com/whois/youtube.com
Admin Organization:Google LLC
Admin State:CA
Admin Country:US
Admin Email:Select Request Email Form at https://domains.markmonitor.com/whois/youtube.com
Tech Organization:Google LLC
Tech State:CA
Tech Country:US
Tech Email:Select Request Email Form at https://domains.markmonitor.com/whois/youtube.com
Full Whois:Domain Name: youtube.com
Registry Domain ID: 142504053_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.markmonitor.com
Registrar URL: http://www.markmonitor.com
Updated Date: 2024-01-14T09:59:58+0000
Creation Date: 2005-02-15T05:13:12+0000
Registrar Registration Expiration Date: 2025-02-15T00:00:00+0000
Registrar: MarkMonitor, Inc.
Registrar IANA ID: 292
Registrar Abuse Contact Email: abusecomplaints@markmonitor.com
Registrar Abuse Contact Phone: +1.2086851750
Domain Status: clientUpdateProhibited (https://www.icann.org/epp#clientUpdateProhibited)
Domain Status: clientTransferProhibited (https://www.icann.org/epp#clientTransferProhibited)
Domain Status: clientDeleteProhibited (https://www.icann.org/epp#clientDeleteProhibited)
Domain Status: serverUpdateProhibited (https://www.icann.org/epp#serverUpdateProhibited)
Domain Status: serverTransferProhibited (https://www.icann.org/epp#serverTransferProhibited)
Domain Status: serverDeleteProhibited (https://www.icann.org/epp#serverDeleteProhibited)
Registrant Organization: Google LLC
Registrant State/Province: CA
Registrant Country: US
Registrant Email: Select Request Email Form at https://domains.markmonitor.com/whois/youtube.com
Admin Organization: Google LLC
Admin State/Province: CA
Admin Country: US
Admin Email: Select Request Email Form at https://domains.markmonitor.com/whois/youtube.com
Tech Organization: Google LLC
Tech State/Province: CA
Tech Country: US
Tech Email: Select Request Email Form at https://domains.markmonitor.com/whois/youtube.com
Name Server: ns4.google.com
Name Server: ns1.google.com
Name Server: ns2.google.com
Name Server: ns3.google.com
DNSSEC: unsigned
URL of the ICANN WHOIS Data Problem Reporting System: http://wdprs.internic.net/
>>> Last update of WHOIS database: 2024-11-18T20:00:01+0000 <<<

For more information on WHOIS status codes, please visit:
https://www.icann.org/resources/pages/epp-status-codes

If you wish to contact this domain’s Registrant, Administrative, or Technical
contact, and such email address is not visible above, you may do so via our web
form, pursuant to ICANN’s Temporary Specification. To verify that you are not a
robot, please enter your email address to receive a link to a page that
facilitates email communication with the relevant contact(s).

Web-based WHOIS:
https://domains.markmonitor.com/whois

If you have a legitimate interest in viewing the non-public WHOIS details, send
your request and the reasons for your request to whoisrequest@markmonitor.com
and specify the domain name in the subject line. We will review that request and
may ask for supporting documentation and explanation.

The data in MarkMonitor’s WHOIS database is provided for information purposes,
and to assist persons in obtaining information about or related to a domain
name’s registration record. While MarkMonitor believes the data to be accurate,
the data is provided "as is" with no guarantee or warranties regarding its
accuracy.

By submitting a WHOIS query, you agree that you will use this data only for
lawful purposes and that, under no circumstances will you use this data to:
(1) allow, enable, or otherwise support the transmission by email, telephone,
or facsimile of mass, unsolicited, commercial advertising, or spam; or
(2) enable high volume, automated, or electronic processes that send queries,
data, or email to MarkMonitor (or its systems) or the domain name contacts (or
its systems).

MarkMonitor reserves the right to modify these terms at any time.

By submitting this query, you agree to abide by this policy.

MarkMonitor Domain Management(TM)
Protecting companies and consumers in a digital world.

Visit MarkMonitor at https://www.markmonitor.com
Contact us at +1.8007459229
In Europe, at +44.02032062220
--

Nameservers

NameIP Address
ns1.google.com216.239.32.10
ns2.google.com216.239.34.10
ns3.google.com216.239.36.10
ns4.google.com216.239.38.10
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