I used track addict to record a video on an android phone. It seemed to work fine, the session recorded the map trace and the mp4 video is a 1.84 gb file. But it will not open
- on the phone
- on the laptop
- on the desktop
- or in youtube if I try to upload

I know it's a longshot, but can anybody tell me what might be wrong and if I can salvage the video file?