Pixie Investigation With Mr. Erwin Saunders.

[Wallfire]

...The motion blur upon panning or zooming the camera is precisely matched.
The focal blur of the pixies is perfectly matched with the focal plane of their distance.
The size of the model is always consistent with the background regardless of the zoom - I would presume
that to not be easy, given the intricacies of the background. It's not like zooming in on a UFO CGI model
in a cloudless sky where there is nothing to match up to.

Yup, I think the animator needs a job in Hollywood at a CGI house, if he or she doesn't already have one!...

Would it be easier to suggest the figures are real or is there a natural 'feeling' that the Pixies in the footage
are fake?

I think this is a case of the videos give a feel good to must people, and perhaps we should just enjoy the videos for what they are, fun, harmless and feel good.   
BTW if it is CGI the person doing it is VERY good