Hmmm, stupid me, I should've told you to start with
MPlayer, the magical "plays anything you throw at it" media player, anyway...

It says - watch the console output for its log - that the movie is in a Quicktime/MOV container, the video stream is encoded with MPEG-4 and the audio stream with AAC (MPEG-2/4 Advanced Audio Coding).
Yes, AAC is
not a well-supported format!

You should either find another movie converter (tough luck, there are so many of them around, with so many advantages and disadvantages!) or try to change the settings of this one (audio settings, from AAC to something else, most compatible: MP3, or fully named "MPEG-1 audio layer 3").
__________________
Joe Forster/STA
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