I had uBlock Origin and I didn’t mind paying for YouTube Premium. When I will mind paying for YouTube Premium will be when all of my feed is full of reactionary populist channels, not to avoid paying part of the income that pays some of the people making a career out of streaming on the platform I’ve been avoiding even watching ads on.
It will be a losing battle for the people not trying to look for alternatives - in the end, Google has control of the backend, they can eventually decide to incorporate ads directly into the streams that are served to people protocol wise and they can decide to forego giving users any warning of when an ad will play and when they will try to force the video into forced reproduction.
That the streams are served in a way where the browser can discern when it should play the ads is more of a courtesy from a legacy architecture that came from a Google that wasn’t intent on cracking down on people adblocking, and people may have to revert back to using more specific and resource intensive YouTube adblockers that try to guess when a commercial break is starting and ending directly from the video stream like old school VCRs did: https://www.theguardian.com/notesandqueries/query/0,-2869,00.html
These days I imagine a database of ads can be built up. Every time a new ad appears, it could well be in the database within a day. Then within 5 or 10 frames, the ad could be detected and the database would know exactly how long to skip forward.