Early this morning I flew over beautiful harbor, two video files were recorded in the microSD card 5 minutes in between but one (512 MB size) is unable to open either by Windows Media Player or GOM player. It said the codec is not supported but the other MP4 file was OK to view. I never took them out between each recording this morning. I'm not good in video editing, please suggest mighty MP4 player software or how to fix the problem and get beautiful video back? How to ensure video are recorded properly ? Help please.