That's a youtube fail for the kids. Maybe they'll think twice about what they decide to put out into the world in the future. It's one thing to twerk...in the mirror/@ a party/for your boyfriend/etc. It's something entirely different to do it on school grounds, with school property, & then broadcast it for the whole world to see.
I know kids don't really think like this, but the punishment factor seems to go up when embarrassment is involved. And I'm not a teacher or a parent, but I hope to never be put in a position where I have to comment on my student's or child's twerking ability.