Oh my God, Youtube is quite possibly the biggest timesuck EVER. It gets even worse once you start *posting* videos...now, instead of procrastinating by surfing endlessly through videos, I procrastinate by obsessively checking to see how many hits I've got, new comments, etc. It's really quite sad (especially because I get email alerts from Messenger if I get a new comment, so really, there's no good reason to keep checking).
However, I've found some fantastic stuff on the 'tube, and the "Favorites" feature is invaluable. I mean, how else can I watch Rita Moreno singing "Fever" with Animal on the Muppet Show (not to mention the CLASSIC "Danny Boy" trio of Beaker, Animal and the Swedish Chef...I may be singlehandedly responsible for about half the hits on that one. ;))
Sure, there are some total trollish beefwits on Youtube, but for me the good far outweighs the bad. Well, until 2am on a work night when I'm still surfing, that is. ;)