Very frustrating. I have re-installed the film viewer as you suggested above Skuzzy, but I'm still having the same problem. When I play a film back, apparently some view selections (zoom I think) are part of the recorded view, the viewpoint leaps 330 yards to the left of the aircraft. I can't do anything to get it back, internal, external whatever and it just stays there. Only selecting 'fixed' view gets rid of it, but it also gets rid of being able to see from the cockpit so not very useful.
I'm at a loss now how to fix it without completely deleting the game and making a fresh install. Is there perhaps a shared file between game and viewer which may have become corrupted?