MacOS Big Sur Beta 10 - Youtube in Safari

Anyone else having problems to play youtube videos within Safari in the Big Sur Beta 10?

No matter what video I choose, it always states an error occured. Only happens since Beta 10.

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Confirmed that "All you have to do is disable "Develop tab -> Experimental features -> VP9 decoder", and then restart Safari" fixes the issue. Thanks, @Arun_Kudiyal.

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I have tried the solution and still no luck... I have the same problem in Firefox and it began right after updating to Big Sur
Same issue here, Safari 14.0.2 on Big Sur 11.1. Disabling VP9 decoder does not help.
Same issue here, Safari 14.1 on Big Sur 11.3, Disabling VP9 doesn't help. I am now using Opera to watch YouTube. This has been going on since the Beta came out in August.
  • I have the same problem in Firefox and it began right after updating

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I installed Mac Os 11.5.2 today, tried all the solutions above, and still had the same issue with Safari not performed youtube well, so lagging.

doesn't work