Why won't a video I took on an HTC One play on an HTC One?

[AC Question]

Video I took on htc one won't play on htc one

I just filmed a 20 min video on my htc one and now when I try to play it back on my phone it says media file type not supported! How, when I filmed it on my phone???

 

[Rukbat]

Re: Video I took on htc one won't play on htc one

It's possible that the file got corrupted. Try a 10 second video and see if it plays back. If not, it's a warranty issue.