I highly doubt that they'll be making one, sorry! I'm not entirely sure if the channel would be that popular either considering the New Leaf hype has died down a bit more. If you wanted it to be popular, then I'd suggest waiting for the next game and starting right away when it comes out. If a new game comes out on the WiiU, then it'll be much easier for you to make videos without spending a bomb (with the connecting to the TV option).
If you don't care about that and you still want to make videos, then buying a capture card is the only way you'll be able to do it. Unless of course you find a way to set up a video camera without getting a bad quality video, which I think is difficult to do with your fingers in the way.