What is a software that works for data recovery

I was listening to a video i recorded. Got on a train and paused it and put it in my pocket to board. When i was on the train i took it back out to keep listening/watching and it had deleted in my pocket. I have downloaded (and bought 1) various software i found online, but the one I bought, while it seemed to recover a big file (the video was an hour) it will not play on quicktime, realplayer, VLF, or any other player I have tried. I get an error on quicktime that says, 'The movie could not be opened. The file is not a movie.'

Anyone can help?

thanks