Please help- Boyfriends sex videos

My boyfriend was out of town and I needed to find his ssn so I went on his computer to find a tax return. He only had one folder on his computer desktop called documents so I checked there and plain as day there were about 20 videos of him receiving oral sex or having sex with (I presume) his exes. There was one video of me, which was consensual, but that means to me that he’s been maintaining this folder as of very recently. We live together and have been together for two years. I confronted him about it but I am not sure what I am expecting. I am not necessarily angry but I feel I deserve some sort of discussion on the topic… he is very uncomfortable and doesn’t want to discuss. Am I off base? What should I expect?