The music for this piece way also quite pleasing to my ears and thanks to the Internets you can listen to the original piece here.
The modified version used in the video above is called Opéra from "Métropolitain" by DJ Emmanuel Santarromana.
The stupid part comes when you look up the music on iTunes. The full name of the piece is
"Vivaldi - Nisi Dominus - Cum dederit - Mingardo" but thanks to words being able to kill people the "Cum" is censored to "C*m".