From the author (brusspup):

5 static images on an iPad are brought to life by passing a transparent sheet with black lines over the screen. These animations use the same concept as my other videos. The only difference is, the images in this video are on a screen instead of printed on a piece of paper. Ever since I first created my first animated optical illusion years ago I have always wondered if the concept would work on a screen. Sure enough! It does. This took about a week to produce. Everything had to be absolutely exact for the effect to work.

I used photoshop to created the 2D animations and Lightwave 3D to create the 3D animations.