While annoying, you have to put things into perspective. You don't have to pay for youtube, and you can watch 30+ minute videos with usually only one or two 15 second ads. Compare that to TV where you're stuck with 5+ minutes of ads for the same 30 minute content. Alternatively, watch Vimeo or something instead, which (correct me if I'm wrong) doesn't show video ads and focuses on higher quality artistic content anyway.