What, you couldn't see the manhole cover? Perhaps because it was disguised to look exactly like a manhole cover.
But seriously, the guy is cheating by using computed interpolation to show "movement" about the scene. I'm certain his little camo boxes would be obvious if he shot actual video from a moving point of view.
By taking still shots from the exact viewpoints for which the camo panels were computed, and then including only those vewipoints in the computed interpolation, he's making it look better than it really is.