Watched the video, looking only at WiiU's side of it, and I didn't notice the framerate drops.
I guess I'm lucky.
Please excuse my bad English.
Currently gaming on a PC with an i5-4670k@stock (for now), 16Gb RAM 1600 MHz and a GTX 1070
Steam / Live / NNID : jonxiquet Add me if you want, but I'm a single player gamer.