Most Helpful Guy
Forget her, nothing you do is clearly going to change her mind. As she is too stupid to open her eyes. Avoid that whole crew at all costs.
Most Helpful Girl
You've already told her. You've done your part. Whether or not to listen is her decision.
Do what you think is right, show her the video and she decides not to listen, let her be.. (Or ask her to go to your house and when the guy comes knocking at your door)