I pay for Premium, and have for several years now. The Lite version is not what anyone wanted. I want no ads on YouTube, without also paying for YouTube Music (which I never use). If $8/month still gets me random ads on some videos, it’s no good. I’m sure their thought was people would turn the normal YouTube app into their music player, but I’m not so sure. Eliminating background play from Lite may solve that well enough. I’d be fine with that as a compromise. I watch a lot of music related content on YouTube that isn’t stuff I’d just listen to in a music app, that I think would get caught my the music filter. On the Apple TV, videos it thinks are music don’t show comments (even when there are comments on the website). I assume all those videos would get ads on the Lite subscription, and there are a lot of them.
I’ve tried cancelling my subscription, thinking it would make me watch less YouTube. I didn’t last 48 hours. The ads were too annoying and I signed back up.