In summary,
When you create a New Library (using the following command)
Manage Emby Server > Library > + New Library
You assign a top level folder to the library.
Under the folder you have 2 options.
- Add movies into the folder (for example La Story.mp4, La Story.srt, My Blue Heaven.mp4, My Blue Heaven.srt)
- Add a folder to hold each movie, and in that folder you’ll have the .mp4 file and the .srt file and any additional files.
Actually, This second option is the preferred on. It supports multiple features.
Recommended file name: Moviename.ext (year)
References