He was in a food court in a mall, not exactly near his car.
Again though, I agree with the sentiment here. Guns should not be the answer to something like this, and shooting was almost certainly an overreaction.
But since it is the US there’s no way to know either of the prankster had a gun and was potentially ready to use it too.
All of that to say is that while I think shooting was not warranted, I, and a lot of others it seems, feel a lot of sympathy for this guy who was just minding his own business, felt threatened, and has probably had his life ruined because of what he felt he needed to do because of the actions of this asshole YouTuber.