I would avoid anything controversial if I were you. Parents get freaked out about strange things, so if you value your job, I wouldn't make this lesson.

I had a student ask me to read a book with her and then discuss it. It contained a lot of material that I felt uncomfortable discussing it with her. I told her we can talk about the psychology, philosophy, and cultural aspects, but I can't talk about certain parts of the book. Also, I immediately told my coworkers, so they knew the situation. I didn't want anything coming back that could be interpreted as bad. The student understood and we had a good time discussing the book.

I suggest erring on the side of caution and don't discuss anything sexual. Often foreigners are seen as loose with their morals, so don't give parents the idea you are instilling your loose morals onto their children.

Gingermark, I love that tea video! I saw it a few months ago, but never considered applying it to this thread. I still wouldn't use it in a lesson here, but I would show it to my own children. I think that's a great place to start a conversation about sexual consent.

If OP doesn't get the OK from a co-teacher to discuss it in class, perhaps he/she might be able to make a QR code handout of the link for parents to view and/or discuss with their children individually. Then the parents could choose whether or not it was appropriate for their child. Perhaps they'd even share it with other children, friends or coworkers and the message would spread. 

If OP is able to at least do the handout route, it might be best to find or make a Korean version of the video.

Heh. Yeah. I rolled my eyes so hard I think I got whiplash.
Also, note that her comments on this thread are the very last we ever heard from her. Coincidence?