[billforsternz]

Really impressive work, thank you. I intend taking an in-depth look later, but just at the moment I hope you'll indulge a more-or-less off topic question; What tool did you use to create the youtube demo on your blog ?

[achipa]

I used a Chrome extension - Screencastify ( https://www.screencastify.com/ )

[billforsternz]

Much appreciated, thanks.