I very much doubt that video is made with any involvement from Banksy. It's an important message, but not a very well made.
id agree on that. it has all his sort of tricks. But not quite the attention to detail. Probably just over keen to see him start laying the punches on them good and hard! Hes awesome placed to slam then sideways if you ask me. The art is an awesome message sender, but he is a way way louder voice than even that these days.