The video shows a rather confused looking Yotsuba in her elf costume, looking in the broken mirror in the apartment.
Huh? Am I a tsukutsuku-boshi again? But there's no wand---
HEY, I'M AN ELF! Now I really have to go hand out presents to all the nice people! Oh man! Oh man, oh man! I gotta find some!
She rushes off screen before grabbing the communicator, her muffled voice mentioning something about "coal for Harold."
((Yotsuba looks something like
this, except the hat has a pom pom on top and she also has candy cane stripe stockings. I-I'm dying from cute.))