Just watched it again. Its the gun, it has to be. He has the hat wrapped around it and when he walks away he puts on the hat and you can still a black object clutched in his right hand the whole time. Object never leaves his hand and when he goes to shoot he does so with his right hand.
The guns out from the start of the video even though he tries to hide it.
Typical gameFAQers are "Complainers that always complain about those who complain about real legitimate complaints."-Joker_X