HELP... Harrasment??

Person X is a student who is known by his classmates for being one that does crazy and funny stuff…
Person Y is Very Very Good frineds with Person X
Person X brought a stuff toy into class.
A classmate Person X doesn’t like, grabbed his stuff toy, triggering him.
He unbuckled his pants, unzipped his pants and placed the stuff toy into his underwear shouting that no one is going to touch his stuff toy.
Realising It was one of the funny things that Person X usually does, Person Y and some of his classmates decided to take out their phones to record the incident and post it on “Snapchat”.
This incidence took place during Recess when students are allowed to use their phones
The teachers came to know about the situation and said that the students who decided to post the incident was actually doing something against the law and the police will step in claiming that they should not be posting someone else online…
Person X Is completely fine with the recordings…
Do note that snapchat is a platform that allows one to post a picture or video on his/her account before it gets deleted after 24 hours. Snapchat isn’t a platform which allows a random person to view someone else’s stories unless the other party has accepted his/her request. The videos that were seen on Person Y’s account were mainly friends that were in the the same school, the rest were all his close friend. There was no stranger viewing the stories.

Is person Y going against the law??
If so, what wrong has he done??