I've released an album via Distrokid which distributes the release to YouTube as well. You can look at detailed reports there. Youtube revenue is split into Ads, ContentID and Red (which I believe is the old name for Youtube Premium). I just checked and I am currently getting a bigger share from Ads than from Red, per play.
Is "per play" the correct metric to use? What I'd like to compare are the hypotheticals "everyone is on Premium" and "everyone runs all the ads", but I'm not sure how to extrapolate this from some random split (I assume you don't see the ratio of your viewers) of Premium-to-ad..