Many thanks to Riehl World View for this find.
You have never heard the Canon in D played this way, I guarantee!
The kid is korean and he’s doing an rock-and-roll arrangement arrangement by a Taiwanese kid named Jerry C. Jerry’s original version is smooother and more fluid, but The Beast thinks the Korean kid just rocks harder, even though he makes a few mistakes. For some reason the Canon has become fabulously popular in Asia. Perhaps there is anime or soap opera circulating on TV there that uses it as a theme song.