Sorry, it works because…
It’s inventive, funny, original (although I’m waiting with bated breath for the YT clip it did or didn’t rip off) and on-brand, with a great, irreverent use of the product.
Then it feels like they needed some kids having a great time because they didn’t think the quirky animal organist was crowd-pleasing enough. You see, he’s fun. What he’s doing is fun. Coke is fun.
And by God we’re going to bash you over the head with that thought even though we don’t have to.