It's a fascinating video but what struck me the _most_ was the manual kerning of the handwriting after it was scanned.
I know I'd have just copy/pasted all those identical echo() cells. Amazing to watch.
Yeah... it's one of those things where once I noticed the kerning was off I basically had to fix it. In many of the illustrations, I did a better job of writing with good spacing and then I didn't need to do as much fixup in Photoshop. But with the illustration I recorded for the video, I was so worried about making a mistake that I spread the letters out way too much.