I was surfing the net to get some of my home made movies to play on my wii and i came a cross this app Wii Video 9.(I do not work for them) It converts the vids to play on the wii from the sd card. you know in the wii book it says only some formats work well they dont. so i converted some of my movies (home made) and i played them on my wii
That is the vid i found on the net. the link to the app is Here if the click thing doed not work the url is http://www.redkawa.com/videoconverters/wiivideo9/
It does work. I allso bought a 2 gb sd card for this and i got a tv tunner so i could record tv shows and them play them with out burring a dvd.
I hope i helped and i posted this in the proper place