Do I read the OP correctly in that Nintendo is actually one of the few where they might let you monetize, where everone else says "no money ever"? Because given all the crap thrown their direction earlier this year, that amuses me.
Not really. Nintendo's policy is as follows:
"As part of our on-going push to ensure Nintendo content is shared across social media channels in an appropriate and safe way, we became a YouTube partner and as such in February 2013 we registered our copyright content in the YouTube database. For most fan videos this will not result in any changes, however, for those videos featuring Nintendo-owned content, such as images or audio of a certain length, adverts will now appear at the beginning, next to or at the end of the clips. We continually want our fans to enjoy sharing Nintendo content on YouTube, and that is why, unlike other entertainment companies, we have chosen not to block people using our intellectual property."
They don't block you from using their videos/images. But if you try to monetize it, they work with YouTube so that they get the ad money. And if they want, they can have YouTube add an ad to your Nintendo game footage and they get the money from it.