I am such a sucker for music like this.
For the best experience, you might want to listen to a couple of minutes of one of the better amateur videos first, the vocalist:
Da Princess
and then maybe 30 seconds of this child piano prodigy:
Alma Deutscher
Can you imagine synching them? Neither could I. Imagine looking at a dozen more similar videos….
Now:
Kutiman: Give It Up
Hat tip to the great website Colossus which led me to Kutiman.