That ... isn't a joke? I'm speechless. That is the funniest thing I've ever heard. It's like a bad Queen tribute band doing a poundshop "To Dream The Impossible Dream".

Just so you know, Diego is her cousin.

Is it just me or is the small font on that thing mangled and very painful to read?

That's totally ridiculous. There's no way the notes I see her hitting would make those nice chords.

I'm sure the parents, or whoever made the video, intended it to be a joke, not to trick people, but the real audio from this would have been painful clashing discords.