This is a short clip of a song in Bearnais, the regional language of Pau! Like many regional languages in Europe and throughout the world, Bearnais has been dying out, and only the older people in small villages really know how to speak it. However, each year, Carnaval is conducted half in Bearnais.
This was filmed after the opening parade of Carnaval, at the Hotel de Ville, and that is the mayor who sings into the microphone. :]