Currently, Plex uses an arcane folder and file naming convention to identify media types and gather metadata from external repositories.
This feature suggestion is to allow a user to specify to use the metadata in the media file as the primary mechanism to identify the media type (movie, tv show, etc) and only using the folder/file naming as a fallback.
I would propose to have this as an option in the Library settings. There is an option called “Prefer local metadata” but it doesn’t actually do what the name suggests and seemingly still ignores that metadata, at least for media type identification.