YouTube sucks. No, not the content, not at all. And maybe it doesn't suck so hard on better computers than the one on which I currently write. But the fact is, on my machines, the rate of dropped frames is worse than a bad print of a Buster Keaton film. It's like watching someone do the robot--badly.
On the other hand, if it weren't for YouTube, I never would have found out what the hell Filliam H. Muffman meant. So there you go.