You don't have AdBlock? I haven't seen an ad (youtube or otherwise) in as long as I can remember.
Honestly, I don't feel a need for AdBlock. I don't consciously see most ads (with the exception of Youtube ones, like I said). They don't even reach my mind. I instinctively know where they are, and my gaze just routes around them.
And in that, I think I'm not the only one. I would guess quite a lot of people have been "trained" the same way.
I tune out ads on Google search, on websites, and ads on Facebook are about as relevant to me as the spam I get in my inbox ([0]). But, on Youtube, I'm stuck with them, so I might as well try to enjoy them. The fact that they are somehow relevant also helps.
[0] Facebook (or advertisers) seems to infer that if I'm in Sweden, I'm interested in ads in swedish. That's kind of unfortunate. Plus, even ignoring that, just like spam, half of them are just referrals to AdultFriendFinder or the likes.