It`s not that what the vídeo shows doesn`t make sense, it`s just that developers can`t think like gamers. Wii U has had good 3rd party support and not even BO2 pulled out bigger numbers than ZombiU, for exemple. What happened? Does the Wii U crowd not like the game that much? Does the Wii U crowd happen to be PS3/XB360 owners who already purchased the game?
And in terms of petitions, how can developers be certain that everyone who signed is going to really buy the game when it comes out?
The ultimate problem has always been one and the same: people claim to buy Nintendo consoles just for 1st party games - and sales seem to point at that. So, it`s devs who need to take the first step, it`s gamers who first need to show they do support 3rd parties on a Nintendo console so Nintendo can have more power to negotiate with 3rd parties.