Literally all the noises you hear are coming from their own voices, and more importantly: MANDY MOORE IS IN IT.
It also features Rachel Platten — 'cause, you know, it's her song.
Plus like a million more famous people. Look, there's Connie Britton and Julie Bowen in tiny little boxes!
Basically, you should just watch it, enjoy it, and let all the inspiration it might give you fill your soul up with warmth: