If I didn't know those guys, I'd think they were crazy. Oh, I do and they are!!
What a great video.

Mais, cout ma bien, Not taking anything away from those guys - they were rockin'! - but check out this video of Jesse Leger and Walter Mouton playing THE SAME accordion!!!!!!!!
http://www.youtube.com/watch?v=zntmUjAKZzs&feature=results_main&playnext=1&list=PLC582F2F2D1F4A261

This is great. Love it. What's the name of this song?

It has several names, when played in second position (G on a C accordion), it is usually called Triangle Club Special. When played in C, it is usually called Enterre Moi Pas, or Hackberry Hop. In the video they were playing both ways.