The Escher Museum in the Hague have a page with lots of Escher videos
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)
Again via Andrew Lipson, here is “Relativity”:
And again via Lipson, here is “Waterfall”:
Here is a gallery featuring the above images, and other Escher-based Lego creations by Lipson and his collaborator Daniel Shiu, with the originals for comparison.
Here is a Daily Mail article from 2011 on Lipson’s Lego work.