What do men do with videos of women in public? (Lowkey rant)

I was sitting at a restaurant w my friend yesterday and noticed someone taking a video of me and instantly covered my face. (He was being very sus w his constant looking and his phone pointed towards me so no, I wasn’t overthinking). Sometime later, he was going through his gallery and I wanted to confirm so I got up and walked behind him to check, he noticed that and flipped his phone. A few minutes later he turned away and started taking a video of another girl who was wearing a crop top. I did walk up to her and let her know about this man and she wore a jacket. I don’t understand why people do this out in public when it’s supposed to be a safe space. But I have a genuine question, what do these men do with pictures or videos they take of women in public ?? ALSO, I have pictures of that guy but idk if it’ll be right posting it anywhere.