Yotsuba loves you. Unfortunately, this video features Notsuba, her sister, who is from the Uncanny Valley and is, in fact, watching you. Right now. Yes, right behind you. No, don’t bother looking, she’ll just hide. She ALWAYS just hides.
Or, it could be that she’s just the artifact of some not-yet-mature 3D rendering software severely limiting the creative capabilities of whoever made this otherwise really awesome video, but do you want to take that chance?