CapgrasDelusion

Yeah, it won’t. Only Plex’s own screengrabs.

For Plex:

In YouTube download-material settings: Extra-> check “generate nfo files”

In plex, create a library called “YouTube” or whatever you’d like, category set to “other videos”. Use scanner: “Plex Video Files Scanner” set agent to “Personal Media.”

Under Plex settings “Agents” make sure under both the “movies” and “shows” tabs that the “personal media” agent is set to use “Local Media Assets” and that that is top priority.

Plex will use the nfo files generated by ytdl for metadata.

I believe there is a dedicated YouTube series agent, but those can be finicky. This way, ytdl has already done all the metadata work.

Currently just using Synology photos but with an eye on immich, as others have mentioned and plan to switch now that it has facial and object recognition. At this point it can do everything I want and has the benefit of being open source.

You have a Synology and Synology photos will do the features you mentioned (multiple users, different permissions). While I wouldn’t recommend it now over Immich I’m curious why you went with photoprism initially?