Thanks - the kudo's are much appreciated and yes it is a lot of work!
As for the file move issue;
I had one user who had mentioned that when a video file got moved, on occasion this would go sideways resulting in a new and empty file, and a deleted original file.
The request was to move the "original" to the Recycle Bin.
Now, moving to a Trashcan is potentially as (un)reliable as just moving a file to another directory, but I did see the advantages of implementing something like this, and some variations of that as well. It may help undoing things when a user goofed up (it has happened to myself hahah).
So no, it would not relate to banners.
Those (if the option was set to do so) will be copied from the image cache (the cache is stored in a subdirectory of the directory where the database file is).
I haven't heard any issues with that (yet).
Or is that not what you meant?
Also: Banners and Fanart (aka Backdrop) are now included as well, and when images are missing RMTV will try to pick them up from TheTVDB.