XBMCnfoTVImporter.bundle VS UpdateTool

Unfortunately, Plex does not support NFO files, at least not with the new Metadata Agents. You would need to use 3rd Party Metadata Agents for Movies and TV-Shows and then use a separate library to use them since 3rd Party Agents don't work anymore in tandem with the new Plex official Agents.

Download this agent. Follow instructions under "Manual Installation." Now you have a new importing agent for plex.

While Plex normally doesn't read nfo files, you can install XBMCnfoMoviesImporter and XBMCnfoTVImporter agents to make it possible.

To utilize NFO files you would need the NFO importer Metadata Agent for Movies and TV-Shows.

Fourth: Using a different Agent. There is an NFO Importer that can read NFO files that you would need to create. This would make the metadata completely local and "refreshing" it would mean that you have to change it manually. Unfortunately, those "type" of agents are 3rd Party and rely on an old dependency in plex. While they still work, there is no official statement yet when those metadata agents will stop working. Plex has deprecated plugins for 4-5 years now which Metadata agents are technically a part of. That also means that you wouldn't be able to mix those agents together. Unfortunately, you cannot select a 3rd Party agent to retrieve metadata for a library that is mainly using the new and official plex metadata agents.

For example, you could create NFO files to store the metadata next to the video files and then use the NFO Movies Importer or NFO TV-Show Importer to read those NFO files that you can create with tinyMediaManager. You could also look into Plex-Meta-Manager but either of those solutions would require that you already have those files or create them, nothing really to get them out of plex in an easy way.

TV shows: https://github.com/gboudreau/XBMCnfoTVImporter.bundle

The first one would be to use a different metadata Agent there NFO importer for TV-Shows and Movies. They will read the NFO files and add them to your Library item. AFAIK you can create those NFO files with TinyMediaManager This would give you total control over the metadata being added.

I use UpdateTool to update the IMDb ratings daily and set the badges where they are missing.

I have IMDB Ratings on my TV Shows. You can do it with UpdateTool. But you must pay for TVDB API.

Tautulli, Plex Meta Manager, UpdateTool for IMDB

Because of this I started using Myntt's Updatetool some years back, which updates my IMDb ratings daily. You can also use Plex Meta Manager to update other ratings such as RT using the mass ratings update operation

Others have answered your questions. Juste wanted to ad that you might want to look into Plex Update Tool

IMDb all the way. Especially when paired with mynttt/UpdateTool, you can get fresh ratings constantly. I update mine every 12hrs.

I use this on my server https://github.com/mynttt/UpdateTool It updates every 12 hours

The mdblist api key should be included farther down your config.yml. More info here More info on overlays here I also recommend sporadically using UpdateTool to update the IMDb ratings of your library, as they can change quite a bit. Especially on recent movies.