That's the thing. I rarely watch, just listening to music doodling in a background tab.

I think I remember some sponsored crap in 'der8auer' or something like 'linus tech tips' eons ago, but I don't watch them anymore.

So I can't really tell, but for my use case it seems redundant.

I also remember having imported uBo-lists from somewhere, allegedly enabling sponsor-blocking somehow. But that was another install. I don't have these anymore, ATM.

Sponsorblock can also skip non-music intros to music videos.