Hey Noam,
I just faced the same problem and I can't find clips anywhere else in the folders.
I see all the thumbnails of what I've shot on the camera saying "unable to display". Nowhere else do I see evidence of their existence.
I do remember changing cards with another a7s camera before this happened but it's weird that this has happened over a period of 15 minutes after which recording is normal even though I didn't put the old card back or make any such changes.
The footage that's missing is very crucial!
Did you manage to find your clips??
Or has anyone else found a solution??
Please help!