It's the Blues the Saoulard or Drunkards Blues.
On the second instruction DVD Steve shows how to play it and on youtube Maz is playing the same song.
You find the song on his second CD "Tit Galop Pour Mamou"

Is the tune Blues du Saoulard?
For this video, I think we should name it the "Dizzy Camera Special"...oh man, I can barely watch the video.

It is Blues de Soulard.

Oh that's great, now I have a frame of reference to sing the lyrics... I had never heard the song with the lyrics! I have attach Blue du Soulard YouTube clip at Link #3.
Maz