Searching for movie data in file xxxx.mov

When I try to open a certain movie file, it spits out the 'Searching for movie data in file 4210 008.mov' error and can't find it. That was the original file name when it was originally created, before changing the file name.

If I have the movie file changed back to '4210 008.mov' then it works fine. Is there any way to allow the file to have any file name and not get this error?

Normally I'm allowed to change the file name, but on this one video, it won't work if it's changed.