Fixed
[YouTube] Fix for HTTP error 403 when starting videos: TeamNewPipe/NewPipeExtractor#1191
Fix crash in MediaSessionPlayerUi while destroying player #11261
Note that this does not fix 403 err...
LibreTube is meant to be used with a YouTube piped (which is a different thing than NewPipe) instance, which proxies the video stream.
It's very nice in theory, but in practice, the instances get blocked constantly. Disabling this option will make your device connect directly to YouTube (which leaks your ip address to YouTube) and make it work the same way NewPipe works