I also have to ask, are people really
that narcissistic these days? I don't want ti to sound that much of a pejorative, but even if we take it at face value, that guy has at least
three cameras going; One obviously on his helmet, one looking forward through the scope, one looking backward at the shooter.
I mean, getting video is cool and all, but really? Unless one has a popular for-pay YouTube channel or something, do people really need to see themselves play from six different angles?
As for the angle of the shot, the only way I can reconcile it is the guy has a camera with a separate sight mounded on the passenger side of his barrel, near the muzzle- actually two, one showing the sight- which is just there for looks- and the other facing back at the shooter.
Years ago we used to make fun of the guys going out on the field with $1,500 worth of gun, tank and power loader. Now they're hitting the field with that AND another thousand in GoPros.