Martin - this is a really great idea, but the terminology is confusing. The term "English concertina" normally means a concertina with "English fingering", that has the same note on the push and the pull, unlike yours which uses "Anglo fingering" and has different notes on the push and pull. So it would be better if the title of your posts and videos were to refer to the Anglo concertina rather than the English concertina.
All the best - Pam