BTW, just to be clear I'm not saying the guys in the video weren't muzzling themselves. Just saying I'm pretty careful not to! Whenever I adopt a carry method I study a drawstroke and try to practice it until it's ingrained in "muscle memory." One reason for this is that, dinosaur though I may be, I cling to the cocked-and-locked style of carry. It takes a lot of training to insure I habitually snikt the safety off when I draw. Presenting a pistol but failing to take the safety off could result in an...awkward situation!
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“I'd rather have questions that cannot be answered than answers that can't be questioned.” —Richard Feynman