21F and 21M. Is there a solution to this?

Hi, I’m a 21-year-old woman and I've been dating my boyfriend, who is also 21. A couple of days ago, we had a major argument. My boyfriend has expressed interest in threesomes and similar topics. He asked if I had a video of me with my ex, who is 22. I told him no because I genuinely believed I didn’t have any since I recently got a new phone a few months ago and hadn’t transferred much to it. I carry my old phone with me, but I only use it for music. After he kept asking, I finally agreed to check my old phone and ended up finding a video. I mentioned it to him, and he asked me to send it. Despite my instincts telling me this could lead to trouble, I sent it because I wanted to make him happy, as he claimed he was turned on by the idea of seeing me with someone else. Almost immediately after, he asked me to delete it from our chat and became upset about a lot of things, leaving me confused. I wondered why he even wanted to see it in the first place. I know I shouldn’t have sent it, but I did. He was really hurt about various issues, and I’ve tried to explain that I can’t change my past and that my focus is on him and our future together. It’s been a few days now, and his mood swings are really affecting our relationship. He even mentioned that sometimes when he looks at me, he feels like crying.