I am trying to organize all my files to at least have proper year on the plex server. Are there any ways to do that? Like setting certain structure of the folders, etc.
Is this about actual tv-shows / movies or some other videos (e.g. home videos)?
There’s an official naming schema describing how to structure/name your videos for Plex to recognize them and add the correct metadata (descriptions, artwork…).
For other videos you could get Plex to show some metadata that is embedded in your files (e.g. for mp4/m4v videos). Plex has no way to group those videos based on what folders they’re in.