You have to take care of this, CM
Your daughter is only fifteen, and she is seriously out of control. She is taking drugs (marijuana, and likely other things have been at least tried), running away, s*x with adult men, and now video taping it.
Is she graduating to the next grade in school? Does she keep up with her schoolwork?
I, personally, would consider talking to my daughter about it, but I would definitely take it to the police. You have tried to warn this guy to stay away from your daughter and he is still around. He is a bad guy; an adult who is taking advantage of a child.
You must get your daughter into counseling, immediately. I would look into drug rehab/drug counseling as well.
You need to get an alarm system that alerts you to anyone coming or going from a window or door.
Take away all access to social media since she can’t be trusted to use it in an appropriate way.
If she were mine, she would be grounded to the house for the foreseeable future. I would eventually allow her “good” friends” to come over and watch a movie, etc. in the living areas of the house. Allow them to do age-appropriate activities.
Is she into sports, arts, dance, theater, band, etc? I would encourage her to continue/join healthy extracurricular activities.
Don’t downplay the significance of this. Your daughter needs serious intervention and supervision.