I've had 3 modded Lets Play videos taken down from my channel (DudeGoBack) by Nintendo launching claims. They were actually blocked worldwide but that was because I left direct links to the hacks though which contained readme files with directions on how to apply them which violates the EULA. Aside from that though, Nintendo has been okay with everything else even allowing registration of most games to the Nintendo Creators Program. They are even fine with fan-made games so long as they can make claims on their licensed music which is quite reasonable.
Unless you're showing people how to hack licensed games or how to cheat or modify games to violate other peoples online gaming experience, I doubt there is much to be worried about. This is mainly due to people posting videos about how to cheat paid currency and was destined from the get go to have a crackdown.
If anyone is worried, there is always twitch and DTube but there are other options like having videos unlisted or private on YouTube. Just showing progress made is a different ball park entirely to showing people how to hack a game itself as it exposes a lot of things developers don't want seen and they're within their right to report it when they don't like it.