I've recently set up my own Plex server and have media files coming from Youtube using youtube-dl, where I'm also getting the metadata for it from the --write-info-json param, however I'm having extreme difficulty getting this JSON data into the metadata forms that plex likes. The videos, typically from playlists, are being inserted into a TV Series style folder, where the playlist name is the Series name, and each entry in the playlist is an 'Episode'. The internal folder structure is:

library folder /
    playlist name /
        first video name s01eXX.mkv
        first video name s01eXX.info.json
        second video name s01eXX.mkv
        second video name s01eXX.info.json

Does anyone have an ideal solution for this, or know of any system in place where Plex can look at a text file alongside the media file to use as metadata?

I've tried a few metadata agents to no avail, typically resulting in critical failures when trying to process the data. It all seems to resolve around the 'search' function where it's trying to split the filename out of the 'media' argument? I've had a few IndexOutOfBounds exceptions, and AttributeErrors.

There's no documentation about this on Plex, even if using the web archive to try to find any, so I'm not sure what the Search function's arguments are looking like.

The agent's I've used are: Youtube-DL Agent and JSONTVAgent. I'm trying to fix the issues with YTDL-Agent but the lack of documentation is taking a while.