Based on the little information available on that item, it seems to be listed as a movie on IDMb – while not being listed on TMDb and TVDb at all. You might try adding it as a stacked file to a movie type library… though there’s a chance Plex won’t recognize it at all because it’s missing on TMDb.
Example
Dokumentationen (Film)
Tod und Spiele - München (2022) {imdb-tt21828974}
Tod und Spiele - München (2022) - pt1.mp4
Tod und Spiele - München (2022) - pt2.mp4
Tod und Spiele - München (2022) - pt3.mp4
Tod und Spiele - München (2022) - pt4.mp4
Well… it’s a community driven database… so the OP is always free to add the film by themselves. That being said, the platforms are getting more serious about what type you’re adding things; so creating a series entry if it’s considered a movie, will get that entry deleted pretty fast
So since it is listed as Movie on IMDB, it is required to be added to Plex ins Movie section instead.
There is no chance to search for items in Movies and TV Shows?
Also it looks like it is not listed on TMDB anymore, I indeed found it and added the ID to the folder.
But since it could also have its reason of being to new, I’ll just wait some days and try all the recommeded approaches.
Neverless I have some more issues with this same approach: