This doodle sketch video is in bad need of repair---
You are right - a part of the animation is repeated.
I used a couple of different software packages to do this and was distracted a bit by other things, so it is a poor demonstration.
I had some difficulty laying in a sound track - so it just wasn't there.
For one thing, one package offers more capable sound editing and the other the ability to make notations with overlays... so I need to iron out some of the problems and re do this. Sorry for the early WIP mess on this one.
For some reason... the underlayers in Painter were visible in parts of the animation sequences, but not in others... some tech glitches that I need to work out.
Will try to do it again better when time permits -
@ bwtr... no one ever accused me of being organized