You gotta love the mental gymnastics people will go through to convince themselves that not paying and blocking ads is the morally correct thing to do.
If you truly have those beliefs the right moral action is to not use YouTube at all but god forbid you'd have to make any sort of sacrifice.
I don't use Youtube at all, but I keep thinking I'm missing out and should make the effort to find a way to circumvent tracking. I can't see that the morality points to an obligation to absorb adverts. There can be no contract on the basis of what your mind must do.
Edit: let's step through this. If I use a towel placed over the computer to block ads, that's morally the same as using blocking software, I think? If I block the ads by putting my fingers in my ears and staring at the ceiling, also the same thing, morally. If I block them by watching them in a negative frame of mind, saying that I dislike ads and won't do what they suggest, I'm still doing the bad thing, the same as using an ad blocker - if it is a bad thing. My obligation, if it is an obligation, is to be receptive. Otherwise what, it's a sort of mind-fraud?
Adding: advertisements use as many hacks as possible to grab your attention. You could broadly categorize things that behave in this way as akin to a) a baby's cries (attention-seeking by something that absolutely requires your assistance), b) an alarm (attention-seeking by something that seeks to warn you), or c) being accosted (attention-seeking by something that seeks to harm you for its own benefit). Which are advertisements most closely aligned with? Is it the same across all advertisements, or do intentions vary? People likely assign varying levels of morality to the above examples; does advertising inherit the morality of the most closely aligned example?
It is still my right to murder to uphold your lack of morals
There is nothing immoral about this at all. They're the ones who chose to send people videos for free, gambling on the notion that people would look at the ads. Nobody is obligated to make their unwarranted assumptions a reality. They are as entitled to our attention as a gambler is entitled to a jackpot.
If someone gives you an ad filled magazine, you can rip out the ad pages and throw them in the trash, leaving only the articles you actually want to read. Same principle applies here. If some random person on the street gives you a propaganda pamphlet, are you obligated to read it just because some businessman paid for it? Of course not.