In most cases if they don't have tutorials that are on piracy, they will go after any content that has Nintendo gameplay in it. Which is stupid because most of what's been used falls within fair use.
So if you have any plans on creating videos like this (Which I have done in the past) all you have to do is not use first party gameplay, and possibly not any gameplay at all. So far haven't had any of my older videos touched, but I'm not a huge channel that draws a lot of attention and I haven't done anything more recent than ironhax. But in theory as long as you don't do something directly involving piracy (freeshop for example) and you don't use gameplay you SHOULD be able to stay safe, but that's no guarantee with youtube's extremely broken copyright system that seems to ignore fair use entirely.