I Was At a this place with my daughter and son in-law, so this person saw me there and decided to record me and now he's telling my grandson that he has the video and he's going to give it to him so he can give it to his grandfather. So recording without my permission, is that legal? Or illegal?

What type of place?

If you were in my backyard and I had a camera ? Or a store, most stores have video tape of everything that happens. There are normally small stickers somewhere that say its

Since this was a public place and a casino you were recorded legally. You are recorded several times a day whether you know it or not. If someone tried to blackmail you with a recording the blackmail would be illegal but not the recording