I hope that I never grow out of finding this sort of thing funny.
The man in the "kangourou" costume is French prankster Rémi Gaillard. He's famous in France for wearing national sports teams' uniforms and slipping by security to join the teams on the pitch, at victory parties, in audience with President Jacques Chirac, etc. - all for the benefit of the camera.
The influence of Jackass and the UK's Dom Joly are apparent in this video of Gaillard on a rampage dressed like a kangaroo. The song is "Kangourou Nomade" by the French ska band Nomades et Skaetera. [DailyMotion]
Note: The video includes a brief shot of a topless sun-bather. I suggest that if breasts frighten you, you should avert your eyes.