@jrewingwanna @Kenno Jonh already answered, but it's this one here:
https://stashapp.cc
If I understand it correctly it uses it's own database so you have to create it yourself, you have to input the actors and tags by hand for instance, but it does grab the information on the files and automatically identify which actors are in which movies (if the information is present on the movie file), it also can sort Tags and Studios, I'm also not sure if it does streaming to other platforms. Like I said it's not nearly as smart as Plex or others.
But the things I like about it is that it's extremely editable, you can add actors and link tags to those actors, you can add any tags you want, you can search for videos that have all the tags you want, you can separate the scenes in your movies, etc...
So it's kinda of a trade of, it's definitely more annoying to maintain, but it's so much better to organize and find stuff.