Natalie, I never used MediaCoder, but video4fuze (developed by one of the community members) works like a charm and is embarrassingly easy to use and install. It converts all kinds of video formats to the one recognized by our beloved Fuze. Even youtube videos work. Grab it here:
http://code.google.com/p/video4fuze/downloads/list
It’s the second link. (I guess you are using Windows?)
Hope it works for you.
