No, it’s this: How the hell does the economy of the Mushroom Kingdom work? So, the clip in question shows Mario and Toad walking through a bustling Mushroom Kingdom town, full of other Toads.

It's true! In the first 10 seconds of play, level 1-1 teaches you the fundamentals of playing a "Super Mario" game: question mark blocks are full of potential, mushrooms make you grow bigger ...