Hi David,
Was waiting to reply until an updated version was ready, which it is now:
https://youtu.be/ilB1-8svCagThere are a few minor changes to the audio track, but mostly replaced sections of video with diagrams and screenshots.
We might be getting somewhere with FSF support in the form of a campaign. The last thing they said was "no", but they didn't quite understand it all and I think they're still going to listen to one more appeal from me, this time a video appeal. It might still be confusing ... I'll have to step back from it for a couple days before re-watching to really appreciate the gaps that still exist.
Do you have some "video editing friends" in Hawaii?
Charlie