Is the common thread in those videos that they are all from America?

Non-prejudiced disclaimer: lived there myself, love the place, lots of friends, other half is a Yank. Etc etc. So not Yank-bashing.

But, really, some of those people in the vid are just colossal idiots who should not be trusted with a pair of blunt nail scissors, let alone a 12 bore ("gauge").

I also think if you are going to have your wife/girlfriend try a shot with your 12 bore or .300 Win Mag, you ought first to be gentlemany enough to coach her in how to absorb the recoil without falling over.