@leocg just tried it in edge, it's working, also when i try it in the private browser of opera gx, which has all extrensions disabled, it didn't work, still greyed out

basically, if you right click twice in youtube to find Picture-in-Picture, you will see it greyed out, if you use any extension they don't work, i tried 6 ones
version: 128.0.5807.78