Wow.
Just a bit over a year ago I pointed to this homemade musicvideo by this band, "Ok go!", wherein they perform a quite complex choreographed dance routine in one take in a backyard. It went sort of viral at the time, probbaly picked up some steam through the summer and probably exploded on YouTube when that went supernova...
So what's a band to do in such a case? Easy: dance contest.
So far, 22 entries within 2 weeks. And they just get better.
(My favorite are the three asian kids featured above 'cause they had to adapt for being one short and they still pull it off amazingly well.)