My apologies to those of you who have already seen this video, and especially to those who had commented but I hadn't yet replied to, but I had to take down the original because it was demonetised due to me unwittingly using some copyrighted music. I don't make the videos for money (just as well) but I didn't want to lose what little income this one might generate so I uploaded this edit.
And I also apologise for pronouncing Nielsen's name as Kay when I know full well it should be Kai. Its my age.