I’ve tried that, besides it making the streams look grainy it also lowers the FPS down to a terrible rate, so that’s not a viable solution. Thanks for the suggestion though
That didn’t work either but I’ve found the culprit.
In the Nvidia Control Panel my global settings for “Max Frame Rate” are set to my monitors refresh rate (60). I guess that multiple instances of brave share this frame rate which leads to the lag/stutter. Once I’ve added “Program Settings” for “brave.exe” and set that to “Off” all windows play videos just fine.