Hi,
I am also having the same issue, from what i can remember it started when the new NVIDIA graphics drivers got released.
Have tried all the suggestions above as well as re-installing both graphics and audio drivers with no success.
I will be watching a YouTube video, Twitch stream, Netflix, pretty much any platform and this problem will happen.
Slowly the video will start to lag a few seconds behind the audio and progressively get worse, refreshing the page restarts this loop.
After reinstalling my drivers the problem went away for a few days then returned.
Now if i try to do the same fix it will not work.
Any suggestions would be much appreciated,
Kind regards.