The real question here is how do these music channels stay monetized? I'm actively curating a music channel since 2018 and so far I was demonetized 7 times for reused content. I tried every potential solution (using animated backgrounds, removing all copyrighted videos, getting claims removed by the artists on my most viewed videos, optimising description and thumbnails, trying to present my channel as a label, even publishing some music etc) and I still get demonetized 8-10 months after monetization approval. On the other hand, I know and follow lots of channels which do the exact same thing as me, and they somehow manage to keep their monetization on all the time. Tried reaching out to them, but of course no luck there. Pople saying all of them will eventually be demonetized are not right, most of them will, but there definitely is some way of keeping these channels monetized. Also, if you know what youre doing and you know how to dig music, these channels can generate large amount of traffic so they are definitely worth investing time into developing them, I was monetized since June 8 last year until April 7 and i made around Eur 55K in this period of time. I even got paid March earnings even though I was demonetized before it was finalized on my AdSense account.