That's FilmAffinity, for movies. It's pretty popular in the Spanish speaking world.
You vote movies, it calculates what it calls your "soulmates" (people who voted similarly) and then you get recommendations Of movies based on what those people loved, which you can filter by genre, era, etc. You can recalculate your soulmates anytime, and there are some options to tweak the algorithm.
You can also organise movies into lists (kinda like music playlists) and those are public, so if my preferences match user X and they happen to have a list titled "movies I enjoyed this past year" I can just check that.