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Trouble with streaming services(like youtube(only streams ), twitch, music streaming) on nightly

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levkinam10
levkinam10

Trouble with streaming services(like youtube(only streams ), twitch, music streaming) on nightly Firefox Nightly 145.0a1 (2025-10-11) (x64) Cachy OS Binary from firefox.com

Trouble with streaming services(like youtube(only streams ), twitch, music streaming) on nightly Firefox Nightly 145.0a1 (2025-10-11) (x64) Cachy OS Binary from firefox.com
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"You cannot play videos in this browser" "This video is unavailable or not supported in this browser. (Error #4000)"

The problem solved by installing ffmpeg4.4 from repository

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Paul
Paul
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  • Top 10 Contributor

Hi

Thank you for helping to test the Nightly build of Firefox.

Please appreciate that the Nightly build is still very much "under construction" and may have unresolved issues. Does the problem occur in the main Release build of Firefox?

levkinam10
levkinam10 Spørgsmålsstiller

Release build also has this problem, but everything works in Chromium.

Paul
Paul
  • Moderator
  • Top 10 Contributor

Are you able to provide an English translation of the two error messages?

Do you have a link to the video that you are trying to view?

levkinam10
levkinam10 Spørgsmålsstiller

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"You cannot play videos in this browser" "This video is unavailable or not supported in this browser. (Error #4000)"

The problem solved by installing ffmpeg4.4 from repository

Areesha Adeel
Areesha Adeel

Streaming issues on Nightly are pretty common since it’s a testing build. You can try disabling hardware acceleration, testing with a clean profile, or switching temporarily to the stable Firefox release to confirm it’s not an OS-level issue. Also make sure all codecs are installed on CachyOS, since missing media packages can break YouTube and Twitch playback.