I know exactly what you mean. One place I found really helpful is https://thisvidscat.net/https://thisvidscat.net/
— it’s not a full database, but it highlights lesser-known indie films and performers. Personally, I’ve discovered several films I would have completely missed otherwise, and it’s been fun seeing how different styles evolved over time. Browsing through it saved me hours of guessing and wandering through random sites, and it gave me a better sense of which hidden gems are really worth checking out.