I couldn't get through the video. Too much marketing. Too much hyperbole. Too little expert knowledge. The show format is painful, the hosts(celebreties?) dull.
From what I did endure it seems Engler believes close range use of FSR is dangerous. His disregard for ballistics moots anything that follows. Maybe I'm just being a dick?
IMHO it's much to do about nothing. An attempt to create controversy for the sake of such.