Thanks for your help.
I actually think I know where the problem lies, but dont know how to address it. I have noticed that in my directory of video files, the ones not working are the only ones not showing an access control list in the permissions. They are missing the @ sign which means they do not have extended permissions.
When I do a “ls -la@e” to show the extended permissions I see the files are blank. Example below:
-rwxrwxrwx@ 2 jeffrey staff 6004801024 Jan 10 17:30 STUDIO (PGM).mov
AudioIndex 328380
NTK_Audio_Level 8
TCXD_DDR_info 68
VideoIndex 236216
-rwxrwxrwx 1 jeffrey staff 45655327232 Jan 11 13:06 STUDIO CAM1.mov
So this must be related. I just dont know how to restore this video index data. But PPro CS6 has definitely refused to load the files and in essence renders them as damaged. But CS 5 loads them fine.
Any ideas?