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Hi, I am desperate for help. I apologize in advance if my english is bad (it's not my first language)

I accidentally deleted everything on my camera memory card (Canon powershot G12). I haven't taken any new pictures or recorded any movies since. I managed to restore most of the pictures, but somehow the .mov files just won't work. The files are called something like f13339328_mdat or f1300000_ftyp with different numbers of course. They either can't be played, or it's a black screen with a scratchy noise. One of them has a frame from the movie. Is there any, any way I can make this work, or are the files just totally corrupted? I am a bit lost in how I should use this software.
Please help this rookie!

Using PhotoRec 7.1-WIP, in theFileOpts menu, enable
[X] mov/mdat Recover mdat atom as a separate file
and restart the data recovery.

List the mov file (sort them by name).
Use two consecutive filenames to concatenate the files together (Use "cat" under Linux or Mac OS X, "type" if using Windows), check if you can play one of the 2 videos.