For a while, I've had problems with a patched yt app. Been going on for probably months at this point, but even with the latest ReVanced patches I still end up with, if lucky, video plays for 10 seconds before infinite loading. Makes me have to use the PipePipe (NewPipe fork) app more than I want, but at least I get ad free videos.
I'd use a privacy respecting frontend, but sometimes I like to comment and I have yet to find one that allows me to login and comment on videos.