One thing for me is that the youtube app stops the audio when the phone locks. I want to listen to a video while I'm driving, I'll even put up with the ads, but I actually can't do it unless I use an alternative front-end app - which is how I've solved the problem.

Restricting background-play is an active choice on Youtube's part to prevent what I would consider a basic function and hold it hostage behind their paywall.

That behaviour fucks me off such that I refuse to sponsor it.