This is a terrible video. I apologize. It was intended as
a test, and it has taken me many years to get to the point of
explaining.
However it is more than just a test. This bootable
hard drive was one of many that I made and used, although I never
produced them and distributed them, as I had once hoped. The
idea is still a good one, although instead of hard drives, maybe flash
drives or solid state drives.
What you see in the picture is a pair of black Sabrent USB hard drive
enclosures. They are standing on edge beside the beige computer
case. The enclosure on the left is the one that I'm trying to
show you.