He's certainly capable of hacking the game to move the coin spawner via third-party tools; what the video is demonstrating is that there's no way to move the spawner while in-game using only button inputs on the control pad.

Shouldn't that be obvious? Or is this like those crazy hacks where they glitch the game with extreme controller input and cause it to branch immediately to the end screen?

IIRC some of his other videos show how you can duplicate and move objects around in-game.