Yeah, it sounds like you may have some emotional scaring from her that either you or your emotions are trying to not admit. Give it some time. You're gonna feel weird for a week or so, but eventually you will get it back. No one knows your sexual drive better than yourself. Take some quiet time to watch the videos or think about the things that get you off. You are in your late teens, so you have nothing but TIME to heal over the whole situation. Go out and have fun with people, the only way to meet new people is to hang out with the old ones.

Protip: If someone you met forever ago appears back in your life. Don't be afraid to get out of your comfort zone. Usually when people are reoccurring characters they are at least of SLIGHT importance

Good luck with getting your manhood back.