Tente isto:
Launch "VLC media player".
Go to "Media"
Select "Convert or Save"
Add "corrupt .mov file" to be fixed.
Press "Convert or Save"
Provide the file name for the destination file
Select the desired Codec from the profile list.
Press “Edit Selected Profile” button to check a specified profile settings
You can also select to add a new profile or delete any existing profile
Press "Start"
Ou
Create a copy of the "corrupt .mov file"
Rename the copy of .mov file to .avi file
Launch the "VLC media player"
Select "Preferences"
Press "Input or Codecs"
Select "Always Fix next to Repair avi files"
Press "Save"