Corrupted .mp4 File from iPhone 4 Weather Balloon Launch
Good news! It's repairable. 

I ran it through this repair utility: 

http://grauonline.de/cmsimple2_6/en/?Solutions:HD_Video_Repair_Utility

I only have the demo version so I could only preview about 3 minutes of the video, but it looks like that tool will work well with your file.