Playing a Youtube video on Google Chrome or Microsoft Edge (Chromium based) causes VR Chat to hang / slowdown (to about 1 fps) even before the video is Fullscreen,
and using a private instance with no one else doesn’t make a difference.
Exiting the Browser doesn’t fix it either, only way to fix it is to restart the game.
Doesn’t happen with Firefox, but FireFox won’t respond to Oculus / Steam VR clicks
Tried on 2 PCs, on VR, both Steam and Oculus
One with i9 9900k, 16 GB RAM, 2070 Super
and another with i7 10700, 16GB RAM, Intel UHD 630