Originally Posted by Tom Frank
The used space on the card looks about right for a 15 min. video, so the file may just not have been properly closed for some reason. You can try to use a file recovery utility... a number of free ones available on the internet. I use one called "recova" (Google for a download site) which works very well for deleted files. But I have not needed to use it for files which may have not been properly closed for some reason. If you try it and it works, please post back here. Good luck!
No luck with the file recovery software including "Recuva". However, I am able to recover my video file using just plain "CHKDSK /F". It convert the whole folder into a file named "100MEDIA" without any extension. I manually adding ".MOV" extension so I can double click the video file to run in the players. Few seconds at the beginning of the video isn't viewable but at least I get most of it out. Thanks Tom for pointing me around this direction.