here's why i don't think this is real -
the guy in the black with the first camera stops hitting the other guy when clearly he's winning - you wouldn't do that, you'd keep nailing him till he stop resisting
When he is punching him it doesn't look real
The camera man moves away as the punching occurs - you'd move closer to get the action
The guy in the black grabs the other guys camera - possibly for payback - but then the guy in the grey also throws this same camera - then the guy with the camera lobs his own camera -Nah, you wouldn't do that, you would run after him and nail him.
Look at how slow the guy in grey runs after him
why would the guy filming stop filming when it looks like they catch up?
Also the guy who was clearly overpowering the other one runs away from him now