well, if it's not fake, then, however bad a bunch of losers the "hicks" are ... the bimmer driver and his lady friend are guilty of armed robbery.
Drawing his weapon is one thing, and, were I in the same situation, and I were TRULY lost at a dead end road with two guys coming at me with a baseball bat, I too, would draw down on them.
Taking the camera, however, turned him from armed citizen defending his life into a criminal taking something from another person at gunpoint.
If, however, the bimmer driver knew what road he was going down, and knew that it was a dead end, and the whole thing wasn't staged, then he is just as guilty as the relentlessly harassing hicks, perhaps more so, because, assuming he's carrying legally, he should know better, he INTENTIONALLY put himself and his lady in that situation, and if he's carrying on a permit, he risks getting it revoked, because in many states, taking ANYTHING at gunpoint, regardless of value, is a felony.
There are other ways to defuse that situation, and he CHOSE to escalate it. At the very least, he COULD be charged with brandishing a firearm.