Japanese Multiplication

I have been wanting to create a video about Japanese Multiplication for a while now and since I recently finished publishing my father's last book, I found myself with time on my hands.
This is the type of thing that gets my 'geek' flowing, but you do not have to be a geek to appreciate it.
It is not a practical technique for doing multiplication (we have phones for that now😉), but some children may find this graphical approach to doing multiplication instructive.