Quite a few years ago, I wrote a boardgame recommendation engine for reddit (/r/boardgamerecommender), and when the quarantine hit, I was watching movies and really scraping the bottom of the barrel with the recommendations I was getting (both automated and manual), so I made couchmoney.
I haven't done much with it - have a few hundred users, but I'm planning on keeping it going under the radar because it's transformed how I personally watch movies. I now have close to 200 couchmoney dynamic lists ("1980s Action", "Obscure Horror Comedies" etc) that update every time I watch a movie and are based on real people's tastes.
The engine isn't perfect but it's adapted from the board game thing, which I've been tinkering with for a long time now.
More than happy to help you if you hit issues or want to bounce ideas ... I spend a lot of time thinking about recommendations!
The recommender morphed into my latest quarantine side project, which is a "name that movie" game designed to be played over zoom. It's still super early (and basically only works on Chrome right now) but if you like movies, you may like that. It's at https://couchmoneytrivia.tv