I couldn't watch the video. I'm so upset reading what happened and I wasn't going to comment, but in the end I am commenting because I googled and found "People who hurt animals don't stop with animals. ... This includes child abuse, domestic violence, elder abuse and other violent behaviour."
So, the Met Police aren't going to do anything. Is that because he's not in their area or because they are busy looking the other way, doing other things? No surprises about the Met Police. Sack all of them and start again!
Some animal charity needs to get involved and also, just think those men are someone's sons. How embarassing for their mother.