But most of the channels I'm interested in have "in video" ads (ads put there by the creator rather than Youtube, I don't know the industry terminology) that remain even if you pay for Youtube Premium.
I wish Premium provided some way for me to predict how many of these kinds of ads are in a video I am considering watching (e.g., by requiring the creator to tell YT how many there are and imposing consequences on creators that lie) but YT does not.
Those are sponser segments and I have no problem with them. These videos can be expensive to produce and these people need to support themselves still. If you take away or reduce their ad revenue, how do we expect them to survive?
There is an extension called SponserBlock that will automatically skip them and other marketing / time wastes. Otherwise I just skip ahead (the highest peak in the watch graph playbar at will usually be the end of the segment)
No, just public sources and seeing others review their income. Which part? YouTube shares details in [0] for how Premium earnings works, I believe the current split is 55% to creators. This is like Spotify where your payment is proportional to your eligible watch time over all watch time from all premium-eligible videos across all premium accounts. YT Premium Lite was announced here [1].
I wish Premium provided some way for me to predict how many of these kinds of ads are in a video I am considering watching (e.g., by requiring the creator to tell YT how many there are and imposing consequences on creators that lie) but YT does not.