Your link is better than a vid. Advice I guess, avoid using words like algorithm - that makes non-tech people think it's some kind of tech thing when it's just a logical recipe. It's not a programming algorithm, it's something anyone can make use of. I suppose deterministic is another such word. Makes me think of philosophy classes I hardly remember.
Avoid numbers like 42 that have cultural significance. There are others of course, that just happens to be the one I know - and apparently you know 
That private shift step is age old ciphering. There's a reason it's age old, it works! Be a spy! Write good passwords!
For me, your link did a much better job of convincing me of the case.
The millennials came up with TLDR, mine is Too Long Didn't Watch. I'm more likely to skim through a written description and go back to carefully read it if I get a favorable impression from the skim. It's quicker than spending 10 minutes on a video.
When I was a kid, I didn't like the concept of skimming, or whatever the teacher called it. Turns out she didn't explain it well and I've only learned the habit out of disliking wasting time. The reality is, many, many writers can't communicate their message efficiently. If you can get the gist in a 30 second glance, you know two things - whether you are interested in knowing more and whether it will be worth your time investment to look at it in detail and focus on it because the author can communicate efficiently.
The point of that is to explain why I won't click on the vid - I can't skim it.
I'm not old by most old guy standards, but I'm old enough to be annoyed by most youtube that is not pure entertainment (lately I've been watching episodes of the Drew Carey Show). However, what got me to click your link was the very brief debate over the video link. Probably wouldn't have done that without the vid I didn't go watch
Kinda funny when you think about it!
Anyway, to reiterate, good job on your explanation Peter. Lots of easy stuff people can do to improve their passwords in there. I'll go back and read it in detail.