1794103 - Wrong video is played when clicking on a YouTube Short

Status: RESOLVED WORKSFORME

(Web Compatibility :: Site Reports, defect)

Description

[felix.hohgraebe]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:105.0) Gecko/20100101 Firefox/105.0

Steps to reproduce:

open youtube.com
find youtube shorts videos
open them in new tab

Actual results:

wrong video is shown ( have to scroll one up)
somtimes only audio plays

Expected results:

right video should automatically play when switch to tab

Comment 1

[BugBot [:suhaib / :marco]]

The Bugbug bot thinks this bug should belong to the 'Core::Audio/Video: Playback' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[felix.hohgraebe]

Attachment: how it looks to me

Comment 3

[Karl Tomlinson (:karlt)]

Reproduction is not reliable but frequent. I haven't managed to reproduce this in Chrome, nor with
MOZ_DISABLE_CONTENT_SANDBOX=1 mozregression --launch 104 --repo release,
but it does reproduce with
MOZ_DISABLE_CONTENT_SANDBOX=1 mozregression --launch 104 and MOZ_DISABLE_CONTENT_SANDBOX=1 mozregression --launch 84.

Comment 4

[Sky Schubert [:skyschub][Vacation, back 2026-08-24]]

Moving this into the WebCompat component for now until we figure out what's going on here. Might be worth sending an email to YouTube folks to make them aware while we investigate. ni? myself for that,.

Comment 5

[Sky Schubert [:skyschub][Vacation, back 2026-08-24]]

It seems... like this is no longer an issue? Felix, can you still reproduce?

Comment 6

[felix.hohgraebe]

(In reply to Dennis Schubert [:denschub] from comment #5)

It seems... like this is no longer an issue? Felix, can you still reproduce?

Hello Dennis
No, I can't reproduce it now. Works perfectly, thank you very mutch!!

Comment 7

[Sky Schubert [:skyschub][Vacation, back 2026-08-24]]

Okay, cool. Thanks for reporting it, though! :)