This is quite a cool clip to watch. very funny and enjoyable.
As the name implies, the clip shows popular dance moves from the old ones to the new ones showing many moves ranging from the very cool to the very strange.
Judson Laipply, by the way, is a motivational speaker who is known for the below top rated viral video on youtube.
For more info on Judson and to see a list of the featured songs, please check out this wikipedia page.