Thread of Linked Videos

In which one is expected to link stuff, probably from youtube, which they find amusing, entertaining, or otherwise provocative of the feely thingy. For instance:

Jonathan Coulton via World of Warcraft: http://www.youtube.com/watch?v=B-Wd-Q3F8KM

Jon Lajoie: http://www.youtube.com/watch?v=qqXi8WmQ_WM

Comic parody of Mac vs PC: http://www.youtube.com/watch?v=av6fWfmugds

And so on. If other forums I frequent do it, so can this one!

Edited to add: But I guess those forums are more geeky than this one.