This is a great ad that plays up what makes this series awesome. It doesn't show any gameplay, but if I were a kid and I saw this, it'd grab my imagination and make me ask my parents for this game for Christmas.
I guess I want to see confirmation that this is official before giving props to Nintendo, though this would be an unbelievable fan effort if it's not official. (EDIT: I see the official upload now.) The audio also seems a little odd (I'm surprised there's no music), though I guess that grabs your attention and makes you pay attention to the sound effects and characters.