Plex Documentation → Your Media
→ Naming & Organizing Your TV Show Files
tt0130414 is a TV mini-series.
- It belongs in a TV Show, not movie, library.
- Plex uses thetvdb.com and themoviedb.org to match TV shows.
Name the file(s) appropriately and place them in a TV show library.
/TV Shows <- Folder added to TV Show library
.../Merlin (1998) {tvdb-83269} <-- Show_Name (year). TVDB ID optional, but helps.
....../Season 01 <-- "Season" in English. Two digits for number.
........./Merlin (1998) - s01e01.ext <--sXXeYY mandatory; ext = mkv/mp4/etc.
........./Merlin (1998) - s01e02.ext
........./Merlin (1998) - s01e03.ext
If you have all three episodes in one file, you can use Multiple Episodes in a Single File naming.
You may need to Plex Dance the file(s).