Can you add this How to Add IFDB Metadata to Your Plex Media Server – Fanedit.org
They literally offer the agent bundle to add to your server setup. I don’t know if they still maintain it… that’s probably something to verify on their end.
https://support.plex.tv/articles/200241558-agents/
https://support.plex.tv/articles/201187656-how-do-i-manually-install-a-plugin/
iirc the link above should still work for metadata plugins (=custom/third party agents).
I just don’t have space on my computer so having fan edits as a default options would be awesome
An agent will require the same amount of disc space independent if it’s manually installed or bundled with the server.
There’s dozens of third party agents for all kind of content (porn, YouTube, regional media, Anime…) in all kinds of qualities (from brilliant ones to ones that’ll corrupt your data). Plex have no control over those… that’s why it’s a third party agent…
File won’t download
I’m not familiar with that product. It appears their homepage (as per your link) shows how to download the .bundle file for thdd we agent.
Keep in mind the „agent“ will only provide metadata for a library. It won’t download any videos/media files to your server.