youtu.be

Conformance report

Tracked site: https://youtu.be/. Checked against the Web 1.0 Specification (2026 Edition), front page only, roughly every two weeks.

F

Fails on multiple major faults. Latest check: 2026-09-28. 4 major, 1 minor; 5.9 MB first-party transfer, 23 requests.

Rule by rule

RuleFaultResult
JS-01JavaScript MAJOR
  • inline <script>
  • inline <script>
  • inline <script>
  • inline <script>
  • inline <script>
  • and 38 more
TP-01Third-party requests MAJOR
  • https://i.ytimg.com/generate_204 (via <link rel=preload>)
  • https://i.ytimg.com (via <link rel=preconnect>)
  • https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&family=YouTube+Sans:wght@300..900&display=swap (via <link rel=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 (via <iframe>)
CK-01Cookies MAJOR
  • Set-Cookie on https://youtu.be/
WT-01Excessive transfer MAJOR
  • total first-party transfer 5.86 MB (over 2 MB)
AV-01Autoplaying media pass
HY-01Missing doctype pass
HY-02Missing title pass
HY-03Missing language pass
HY-04Missing charset pass
HY-05Missing alt text pass
FT-01Web fonts pass
RQ-01Excessive requests 1 minor
  • 23 resource requests
FR-01First-party frame pass

History

DateGradeMajorsMinors WeightRequests
2026-09-28 F 4 1 5.9 MB 23
2026-09-14 F 4 1 5.8 MB 23
2026-08-31 F 4 1 5.8 MB 23
2026-08-17 F 4 1 5.8 MB 23