Movie Unavailable after adding local extras

If in doubt, Plex Dance the offending files. If you rename ANY file in a location where Plex is watching, Plex notices that, but will not re-match the file. Follow the steps in the Plex Dance article. (hehe, this forum automatically makes a link out of the words plex dance. plex dance. *teehee*)
*embarrased cough*

  • Move the files out of the location, rename them (if they aren’t named with the proper “-featurette” label.
  • Click the triple dot next to the library, select Scan Library. This lets Plex notice they are gone.
  • Click the triple dot next to the library, point at Manage Library, select Empty trash. This will erase all/most traces of the files existence.
  • The dance suggests you Clean Bundles here, but I don’t do that unless a file is being particularly sticky.
  • When you re-add the files with the proper name, Plex should now properly fill them as extras (fingers crossed).

By the looks of your “Media Info”, two featurettes for the movie got improperly matched as “duplicates” of the movie itself, rather than extra files.