Thx for the answer.
True, I’ve to move this one and two others in this library in same folder (like series).
Though in final solution, before make this post.
But, to understand what’s happen, back to library situation:
1 My library is Movie.
2 Two others telefilms from same serie (collection) are match 100% OK
Her result in Plex Media Server library:
3 Now, why this one is not matching?
Here the result from “Meurtres à Granville (2020)”
The other two episodes are on TMDB (also) listed as a movie. That’s sometimes and inconsistently the case for series, where the episodes more or less qualify as a tv movie i.e. for special episodes.
you can only match items which are appearing in the online metadata services
Depending on how these items are classified, they must be in alibrary of the type Movies or TV Shows. An items which appears as a TV Show, doesn’t match as a Movie and vice versa.