Personally, while I'm almost frustrated enough with YouTube ads to use an ad blocker, I'm hesitant to do so because the authors of the videos I watch are often precisely the kind of people I want to support, and I've heard YouTube is hard enough to depend on for income without people blocking ads. I'd love to have an option to directly pay money instead, but I doubt it'll ever happen.

Twitch.tv is similar but considerably more annoying - but it provides such an option, and I'm considering buying it, although (unlike YouTube) I probably don't watch enough Twitch videos for it to be worthwhile.