From the
Eris User's Guide:
Looks like either transcoding (format conversion) or finding a video player app is in your future. Two different converters are
MediaCoder (free, but a royal pain in the arse to use), and
Android Converter (not so free - $40). You might also want to do a Google search such as "android media players" - there's even a couple of threads on this board about it (mixed results)
Smartphones are not PCs - remember it wasn't that long ago that an iPhone couldn't open PDF files or play Flash videos.
eu1