What movies and TV shows Kodi can find depends on how you have structured your directories (in part) and name your media files.
I place my movie BD rips into a directory called BluRay, my movie DVD rips into a diectory called DVD and my series DVD rips into a directory called DVD series.
Then when i add a sources to Kodi, i can specifie the BluRay or DVD directory, both of which i would specify contain "movies" and as such i will use the default movie scraper for "themoviedb.org".
Or i specify "DVD series" as a source which i would specify contains "TV shows" and used the default scraper for "thtvdb.org".
(Obviosly the fact you must specify the contents of a source implies you can't mix movies and tv shows in the same directory).
For the scraper to be able to find the movie within "themoviedb.org" you must use the correct directory and file naming convention.
My movies are all named "title (year).kmv" and my TV series are all names "series name SxEx - episode name.mkv" (where Sx is the season number, eg. S3 and Ex is the episode number, eg. E4).
See my post
here for some links to the wiki.
It may be of help, or not :?
Note that at the moment i use a few USB HDDs with the same directory structures so my sources are added with source names like "HDD1 BluRays", "HDD1 DVDs", "HDD1 DVD series", "HDD2 BluRays", etc.
Obviously i need to update to a NAS where adding capacity will not impact Kodi as i will not have to add new sources from new HDD's as i do now.
It will simply be a NAS thing where i simply insert HDDs which seamlessly increases capacity of the HDD pool with no change to "sources" as far as Kodi is concerned...
Cheers.