That one is unknown and seems to contain more than one language. One word I know for sure: "Hallo", which seems to be Thai. (commonly used to answer the telephone)
However the guy's face looks like an emergency exit to me - hit with a crash axe.
I whistle or try to sing to pop music songs when driving my car, similar to the guy in the video except i am about 45 years older. But some of those "castrasto" singing guys can sing much higher frequencies than my daughter.
My face and other parts of me turn blue when I try to sing as high.