This channel is pure Nintendo, no fuss, no muss. A lot of it is also pure gameplay.
For the most part, you won't come to NintenDaan to find critiques or even gameplay with a side of commentary. (Although there will be the occasional chatty video, like the recent Super Mario Party launch stream.) Instead, what you'll find here is first look gameplay for offerings on the Nintendo eShop.
Actually, I should probably warn you. A lot of the gameplay is straight through without editing. So, if you're looking to avoid spoilers, you might want to stick to some of the shorter videos in the channel's archive.
Or, if you're looking for something without any possibility of story spoilers, perhaps a channel focused on creative games?