I forgot that wasn’t mentioned in the Advanced Settings documents. You can also use the three dots to the right of the library name. See Editing Libraries.
Try the Plex Dance with the Deleted Scenes folder.
I have it working on my server. See file structure below.
In Plex Web, Plex Desktop, and Plex Android Mobile, the extras appear on the main show page below the cast pictures. See the Plex Web screenshot below (I’m using some test files, not the actual episodes & deleted scenes, so the thumbnails are not correct).
File structure:
TV Shows <-- folder added to TV show library
...Supernatural (2005)
......Deleted Scenes
.........Deleted One.mkv
.........Deleted Two.mkv
.........Deleted Three.mkv
......Season 01
.........Supernatural s01e01.mkv
.........Supernatural s01e02.mkv
.........Supernatural s01e03.mkv
Plex Web
