I wasn't familiar with this thing, but that first video was *amazingly* effective, for me. I'd see these all-the-way messed faces in the periphery, glance over, everything looks cool, go back to middle, and everything is immediately messed up again.
What a strong illusion.
Edit: The only way I can describe it is that it was like the faces in the periphery were collage. Assembled from bits of different faces, cut out from photos. And a given face not 'updating' all at once, but part by part (albeit rapdily). Mind-bending stuff.