The video clearly shows them crushing the heads on pythons and then says that "obviously" they're still alive because they still move around. Anyone killing animals knows that bodies still move even after the brain has been destroyed. It's the same argument PETA/HSUS/AR use to say that cows are still alive while being butchered, because a leg is kicking or the body is twitching.

It might not be great for the snakes to get killed for skins, and obviously threatened and protected species should not be harvested... but killing a snake that has a healthy population for skins(and meat) is no different for places like that than killing deer or turkeys is for us.