ZX 81 Image Maker by Refresh Creations LTD (2006)
This video shows a ZX81-program along with a song by Chris Sievey. The song was released on 7”, and the program was on the B-side. When you recorded the B-side to tape and loaded it with the ZX81, you got this video. More info.
Btw – the ZX81 turned 31 years old yesterday!