Gad wrote Point in making a yt if you do not want people to watch?

ALl publicity ia good publicity

It's not ok for him to watch my videos on a school computer and humiliate me.

Youtube is one of the most visited websites on the internet and you chose to upload videos onto your channel. If you or your friend don't want people in your class to watch your videos you should stop making them, make them anonymously (Don't show your face, hide your voice) or put them on private.

Your French class isn't going to last forever, when you finish it you and your friend will most likely never see these people again and they'll forget about your videos.

They've seen your videos now but it's not the end of the world.

"Contemplating suicide"

You make videos for people to watch.
If you can't handle people watching them, you shouldn't be making them..

Don't worry about what people say in school, the amount of people I've seen since high school is minimal at best and every has matured. Don't stress any of it. Unfortunately the only thing you could attempt to do is take the video down or make them private, once something is online it's online