There is quite a bit of time when he the kid wasn't on video, and it IS possible he was pointing that gun at people at that time.
However, that is irrelevant, the method for dealing with that is arresting the kid and letting him have his day in court, not killing him on the spot.
I wouldn't doubt that he DID at some point point that BB gun at someone, and if at THAT time someone had busted a cap in his ass, too bad so sad, but after the fact and after the danger has passed is a different matter....
So, making the claim that he never pointed the gun at anyone is stupid and unnecessary and will probably backfire when it gets proven that yes he in fact DID point the gun at people.