I can't see the youtube clips (I'm at work) but it sounds like I wouldn't want to.
Hey, don't get too upset about this stuff.
Kids do *really* dumb things (I know I did), not because they're evil or anything like that, but because they truly are not thinking, in the way only a young person can manage.
Round our way (which granted, isn't a rough area) you might see kids acting up or doing something anti-social. If you call them on it, it's like they're snapping out of a trance & they say 'oh, sorry' or similar. Pure & simple: not a thought in their heads...