I can confirm that the video isn't available in the UK. I am actually meant to be doing the demo this thursday so I was hoping the video might make it here. If not I was planning on emphasizing the type/antitype nature of the chart (without using those terms of course) and generally making it seem as silly as I can get away with.
This sounds fun. Report back how it goes. I predict, though, that you will be sickened by the number of people that come up to congratulate you on how well you handled the part and how obvious it was to them after your explanation.