To me, this video is shady. They change their target acquisition sequence, and they also do things like stop 1 short on their mag to keep a bullet in the chamber while doing the mag change, then shoot the extra round on the tail end... it's also quite apparent that Jim is heavily sandbagging while shooting the higher round mags.
While I agree with their points, anyone with an half ounce of gun knowledge is going to see that they're fudging this quite a bit.
I think it discredits their point. They should have just done it straight up. The results wouldn't have differed a whole lot and they would have looked more legit.