i was sure this view would show every at least video file in these folders as like a sorta manual fall back but apparently not. That’s why I thought something deeper was wrong
If Plex cannot match it, then it won’t display it. Applies to both movies and tv shows. Everybody bends the rules a bit, but if you stray too far, then Plex may match it incorrectly or not display it at all.
An FYI that Plex can read embedded metadata in MP4/M4V files (not in MKV or others). If the metadata is wrong, the media may not display correctly. To enable/disable, edit the library → Advanced → Prefer local metadata.
If there is something you don’t want to rename, don’t care if it matched, etc., then use an Other Videos library. Plex does not try to match contents to any online database (TMDB/IMDB/TVDB). You won’t get cover art, cast list, etc., but if you don’t care, are going to watch and immediately delete, etc. then it doesn’t matter.