Great Video! Minor nitpick (And he did mention that he wasn't counting things like workstations and servers), but the history of Key locks on desktop size computers was not a novel idea in 1984.

At my university there's a busted Data General Nova (1969) front panel with the lock cut out gathering dust in a cardboard box. I wouldn't be surprised if even earlier computers had locks, although most probably weren't desktop size like the Nova.