If you have trouble after doing this, contact Nintendo.
thx for the video, but i think most player who has this problem does the exactly same in the video, but we were stuck after entering the 4 card symbols.
problem solved! i were using the BenQ w1500 projector to play the Wii U as a video output, it was connect by wireless HDMI, after i tried to use normal HDMI cable to connect the Wii U then it works, this trouble may caused by the signal disturb from any wireless receiver, and after paired the gamepad and Wii U, I can keep using the projector in wireless.
hope u guys can fix it too! : )