You could try using an open-source client for YouTube. Like Freetube for pc, windows, and mac or Newport for Android. That’s what I’m doing. Both of these don’t use its API generally and you don’t make an account on them. You can still access the content while having an app that works to get rid of ads entirely and without all the bloatware.
On the page showing the app screenshots, it says it will soon be able to interact with mastadon. This is the moment.