option 1:
you can rename your moviesheet to a number e.g. 0
just don’t forget to rename also the metadata & dummy file.
option2:
Just don’t use the dummy file structure
and place the movie in the folder and as thumbnail set the moviesheet.
option3:
rename your moviesheet using small letters e.g. red
and rename your actual moviefile using capital letters… e.g. RED
i’ve not tested this one, but i did the renaming in the xml file and it worked!
for this you must have an xml file for the moviesheet.