Only rename movies / files without movie folders?

How could I selcect / batch rename only the movies / files / fan-art, etc. which do not have a single movie folder but are stored in one movie folder which also contains movies with single movie folders and single movies? So I do not want rename the movies which already have a single movie folder.

Single movies in the movie folder:
[Image: 7LyDute.png]

And movie folders in the same folder:
[Image: 4dyfHEG.png]