The patches on all the officers are clearly NYPD and the left shoulder patch on the officer in the foreground is that of the NYPD Emergency Services Unit. The clothing is proper for early to late Fall in NY. The cops are in long sleeves.
Updated RFNJ with your info - thanks!
I agree that the YouTube video offered nothing that even comes close to proof. They even got the middle name wrong at the beginning of the video. Weak, amateurish job.
It may be that he’s OWS but I have my doubts. I think this is a psycho that fell in love with a movie character and decided to try to emulate him. I’m not sure there is much politics in this dude at all other than he wanted to be in medical science and then slowly realized he didn’t have the brains or the talent to pull it off so he escaped into some fantasy world where he is The Joker. I think he’s another Hinckley.