I recently bought a new server setup for Plex, and a coworker who has done the same noticed that I was missing a number of files that were on my server but not being scanned by Plex. He had actually come upon FileBot for his own use and tried to set me up, however we encountered a weird issue.

When adding some of my files, FileBot just doesn't seem to find anything on them. I have tried using TVDB and TVMaze, however both have the same issue.
Could it be due to the filetype being XVID codecs on the mystery files? I had thought it was simple name search query, so I haven't tried encoding them differently yet.
Thank you for any and all help!