This is certainly an interesting way to diversify your sex life, but I think the first thing to do is to find out what categories your partner prefers. If that's something you're willing to put up with, you can watch that category together. I, for example, because of my preferences, can't watch these movies together. Since I like to watch beautiful Asian women play with anal and their waste. I like to watch how they smear themselves and their partners, but this category is not available everywhere, but only through https://thisvidscat.net. Such videos excite my fantasy, because I imagine myself in the place of this man. Probably for this reason I cannot watch such videos with my partner.
I've found that this can be a good way to start a new conversation about intimacy and desires, but it's important to calm down and make sure both parties are comfortable with it. The key words here are communication and respect.