How do I fix Galaxy 5 incorrect data during video playback?

A

AC Question

How do I fix Galaxy 5 incorrect data during video playback

I took video from the stock video recorder installed on the phone. Galaxy 5. Say a minute of video. I have plenty of space on my sd card. When I attempt to review the video I get about 20 seconds into it and it suddenly stops with an error.
"unable to play video File has Incorrect data.."

What is up with this?