First time I've seen this. I was reliably informed that the man had attacked a police officer. But the man was attacked and punched to the ground by some enrichers, and then the police officer immediately attacks the man. Obviously the man doesn't know it's a police officer attacking him so he tries to defend himself, and gets arrested.
Maybe the video is missing something at the start where he does something illegal like installing air conditioning, but he looks like the victim of an assault here. What the fuck is wrong with the police in Britain?