Well, I solved my own problem (I think). Using telnet I checked /mnt/user0 if there was a folder called "Film."
cd /mnt/user0
ls
There wasn't, so I made one.
mkdir Film
Now I'm running the mover script, going back to the root directory (don't kill me if this isn't necessary, I'm just reporting exactly what I did to try to fix the problem.
cd
mover
and it seems to be copying stuff to the array. I'll report back later with more results. I have a backup on a different computer that I'm not touching until I have confirmed that everything is OK.
Again, I'm completely new to this, and could be completely wrong, but it appears that mover script only works on folders where there a corresponding folder in the /mnt/user0 directory. I guess sometimes one isn't created for some reason.