What makes these videos obviously stupid, is the portrayal of worldly people as being either, a violent criminal or a sexual deviant, which even Witness teenagers know that this is not true, particularly at school.
You see, when I was in High School, the student body (like the broader community it represented) was stratified into different social groups. You had your sporting jocks, the trendy rich girls, the poor, the anti-social types (like today's Goths and Emos), the Greek kids, the Italians and the list went on ... none of which would be seen dead, in the company of the others. But what about the over-sexed students so often described in Watchtower productions? Well I'm sure they existed at my school, as they must have been in all others, but percentage wise (once you deducted everyone else), were not an large group by any means. And they (like everyone else) kept to themselves.
Personally for me as a Witness, high school was sort of ok. I was one of the library nerdy types and I had a couple of worldly friends, who like me, kept apart from the others in our own little corner playing chess during lunch.
But yes, it is true that more kids are having sex than in the past, but it's not as much as people think. In fact, most sociologists will tell you that, conservative moral values are once more on the rise in the West. Which deflates the whole narrative the Governing Body likes to push. That's why I feel quite confident in saying that 95% of high school students today are more worried about Friday's math test, than hooking up with Jodie or Brad after class.