Just so you are aware. The new modern plex agent/scanners use a consolidated metadata approach. Metadata can come from imdb, tmdb and/or tvdb as just a few examples. There is currently no way to tell plex, go get all metadata from tmdb. Many folks are confused by this.
So as an example take the Harry Potter movies. For UK, some of the movies use titles/summaries from imdb others use tmdb, cast credits comes tmdb and genre comes from all three. Its a right mess if you expect data to come from one source.
Feel free to vote [Feature Request] Ability to specify Metadata from a single source (IMDB, TMDB or TVDB) if it’s of interest but I’m not hopefully this will ever be implemented.