There is a short TED Talk from a YouTube employee, Kevin Allocca, called "Why Videos Go Viral."
Have a look! It's very funny, and very nteresting :)
Kevin Allocca: Why videos go viral | TED Talk | TED.com
www.ted.com Kevin Allocca is YouTube's trends manager, and he has deep thoughts about silly web video. In this talk from TEDYouth, he shares the 4 reasons a video goes...