So I think you're asking, "why prosecute a victimless crime?"
There's a couple reasons. Some people want the law to uphold societal moral standards. Some say that victimless crimes aren't actually victimless.
- In this case, it's not clear that the male in the video consented to the distribution of the video.
- The video shows a girl who may not legally able to consent to the sex act (The male is presumed to be an adult, but an age was not given in the case).
- She enabled the further distribution of the video by giving it to a friend who passed it on to other students.
