Sex tape?

Me and my boyfriend had just finished doing the do. And I noticed while we were having sex he had his flash on his phone. I didn’t say anything at the time but after I asked him why he had his flash on. He said he was recording it and I asked why? And he said so he can look at it later. But I live with him...and we have sex almost every day sometimes twice a day. I 100% trust him. Am I wrong for being concerned?? Does anyone else’s boyfriend do this? Or do you guys think he’s trying to send it to anyone? Maybe I am just over thinking things but I would like to know what other women think about this. And how to go about it.