That hit the spot!!!

[Updates below] John Doe, our 16 (coming on 17) year old male tabby, getting his back scratched at the right spot. Deaf as a doorknob, not a single tooth left in his head and unable to maneuver well due to a swollen liver from old age, he loves getting scratched where he can no longer reach himself. Update 30th December 2020: Wow, the sudden interest in this old video came out of nowhere. Quite a few questions asked, but rather than try and reply individually, I thought it would be easier to just add in answers to some of the most common questions and comments here in the description.