There are truly no words to describe this video in a way that does it justice, so instead, let's just put it this way:

A German musician named Flula Borg enlisted his mother and father to join him in a drive around town, bringing along an audio looping device and an accordion, so that the three of them could bring us the world's most fantastic rendition of LL Cool J's "Mama Said Knock You Out."

To answer the questions you undoubtedly have: Yes, it is the best thing currently on the internet. And yes, this song is exponentially improved by a German lady in a hoodie carefully enunciating the "I'm going to knock you out" part.