While it turned out to be a missing CODEC (can be the user installed another CODEC?) I find
VLC PLAYER
To be my choice when trying to playback stuff like this. Try it.
Bob
I have a Kodak Easy Share C122. Takes videos fine and playback on camera is perfect. But when I upload onto my computer, only the audio plays. How can I get the video to play? I'm using the Kodak software appropriate for the Easy Share. Thanks for any help!

Chowhound
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