I watched from the link which is set to start at a specific point.
So nope I didn't watch the whole thing before commenting.
But your linking skills suck, next time make sure your link doesn't jump to a time stamp unless that's where you want people to go.
So, I watched the beginning of the video, and well it did stop several common pistol rounds.
That being said, you were going to be going to the hospital with a busted face, but you'd be going to the hospital, not the morgue.
Try those same tests at the same distance with a standard IIIA soft vest and you'll find similar, if you aren't wearing plates, bigger stuff will send you to the hospital from blunt force wounds, but you'll be in the hospital not the morgue.
That being said, there is going to be a difference between what you get mail order from china for a couple dollars, he didn't really specify the quality or who made the ones he got or what they were made out of. The deformation looked suspiciously like steel with a thin cover sprayed over it and not the thicker ones with a ceramic part on the front.
The bigger issue however is that regardless of the stopping power, at a certain level you are just getting too much blunt force impact to the head.
So your common shotgun, .22, 9mm and such common street guns, it's going to mean hospital vs dead.
Something else to think about is that in more chaotic situations, you might be getting things coming at you from further away and ricochets from random directions.
I just think about all that hot air, as you breath, and the sweat. Moving with that on, in 90+ degrees... All the sweat dripping in your eyes.
uggggg