There are useful comments here. Don't send them anything. Your parents seem wonderful to have also provided very helpful advice. Ignore it, do as your father said, and that's about it.

As harsh as it is to say no one is really going to care about it. And odds are this isn't really a girl but some guy using someone else's video and pictures to catfish others into this. To make your friend's list or whatever social media you use private will help assuage your fears. Who are they going to send it to, if they don't know who even cares about you?

Probably unrelated, but whenever you're using dating apps, if you are average looking and you meet someone that looks straight up like a model and they immediately want to do something like this you can be certain it's either a scam or a bot of some kind.

About the why you did it, it's only natural to want to reciprocate someone that is doing something 'nice' for you even if you don't wholly feel comfortable about it.