Soundwave on 17 October 2012
There was no DVD for the Wii anywhere. There were plans to make a DVD hardware dongle (like the first XBox) early on as I recall but that was scrapped. In Japan they did have a video-on-demand service for Wii though.
There is no video input for the Wii U, unless a third party can can a video in using one of the USB 2.0 ports, then I guess maybe you could do things like stream cable TV to the tablet for example, but that's a wide ranging hypothetical.
My guess is eventually the Wii U will be cracked and there will be a ton of media player style homebrew put onto it for what that's worth.
