Solved: Ok, it seems to have been a software problem. That had to do with the sync. I have installed ubuntu on the laptop for now and everything works again. Some update seems to have shot something. I am now using a
Edit: I want to add that this problem occurred from one day to the next. I’m using Jellyfin as playback, but this effect even occurs when moving windows over the screen
Based on the screenshot I assume that you used youtube premium lite (what ever this was…) on your smartphone. Therefore, here the obligatory recommendation for NewPipe. Quasi Youtube Premium as apk. It has all the features you need:
no ads
you can close the app and your videos keep running in the background
you can turn off the screen and your videos will continue to run in the background
There is also the fork NewPipe x SponsorBlock (link to repository) which integrates SponsorBlock into the app. (duh…) This will also skip the creator’s ad blocks in the video.