[josephzitt]

Join the files together into one movie using this... https://mkvtoolnix.download/ assuming they are mkv files. Insert chapters for each appended file.

 I've used that tool before. But, as I said in an earlier comment, I need to keep the files separate and identifiable as files. (They're not "Fantasia"; that was just a well-known example.) I take from these comments, then, that Kodi can't actually handle this use case.