Well, the videos I've played on my Wii were edited and encoded using Adobe Premeire Pro w/out any special codecs (i.e. Cinepak, Sorenson)
My manual states -
My .mov files didn't deviate from those specs and it worked fine for me.Format: Quicktime (motion JPEG) (.mov files)
Size: Up to 848 x 480
Oh yea, there's a little disclaimer after all the supported file format specs -
PLEASE NOTE THE FOLLOWING:
* Some files in the above formats may not work with the Photo Channel
* The audio components of some video files may not be playable.
* Using an SD Card with slow transfer speed may result in longer load times or irregular video playback.