It's very entertaining and the guys did a great job but did you notice that the crowd would "WOOOH!!!" when the music would change? It's like they were cheering for themselves because they recognized the song.
i love watching this kind of stuff too.. You can learn alot from it.. Honestly if any of you guys that dont know how to dance are interested.. Type in Popping Tutorials.
It takes time but before you know it your grooving like the guys in this vid.