Is this true? I play music on the street sometimes. Am I violating the law?

Seriously concerned. Not that I want to defend the cop (o haven’t watched the video), but I feel that if we start enforcing these restrictions we are going to get ourselves into a rabbit hole of no fun.

Talk to a lawyer about it. I have a musician in the family who performs at venues and also likes to busk, and they pay some subscription fee for access to a library of music they're allowed to legally perform.