That last video is nothing but girls having fun amongst themselves.  I am sure when we were in high school, all of us talked s#it.  I know, at one time, I used to swear like a sailor, even in public, until some sense knocked into my head.  As long as no one is hurt.  Of course, they should have better sense than filming themselves, but when you are young with hormones raging, lapse of judgement is not unheard of.

That first video was indeed quite surprising.  Moral values are something instilled in kids by their parents, teachers but more so by the society.  When our Nepali society of adults is so corrupt and shameful, these kind of behaviours do crop up among kids.