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Not able to play youtube livestream (including the videos that were streamed earlier)

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I am not able to play youtube livestream videos (including the videos that were streamed earlier). I am using Ubuntu 20.04.2 and firefox 87.0 (64-bit). I tried disabling all the extensions; but no luck. I am facing the same issue with BlueJeans also. Youtube displays - "Your browser can't play this video."

I am not able to play youtube livestream videos (including the videos that were streamed earlier). I am using Ubuntu 20.04.2 and firefox 87.0 (64-bit). I tried disabling all the extensions; but no luck. I am facing the same issue with BlueJeans also. Youtube displays - "Your browser can't play this video."

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Here is what works for me.

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Make sure you have the latest FFmpeg and libavcodec packages installed.