Here is an excerpt from a National Film Board of Canada film which elegantly animates Escher’s work:
Here is what is apparently the only surviving film of Escher at work:
Part 1 of a 2 part documentary on Escher with Roger Penrose:
I long to attempt some of these Lego versions of Escher images.
Firstly, via the website of Andrew Lipson, here is Ascending and Descending (the ever-rising staircase)