I think Jellyseer gives you the ability to watch trailers or see external links (imdb, tvdb, etc) for the show/movie.

Like others have said, this stuff is really about building a collection not streaming something the moment the idea to watch it pops in your mind. It can replace Netflix but you’d want to build it up first (with plenty of HDD space to do so). Mine is also shared with family and friends so it supplements their watching too.