ZX81 still awesome after 40 years!
5:02
Raspberry Pi Pico Overclocking, beware there is a catch!
15:44
ZX81 Composite Video Mod - Fit and Test
17:06
ZX81 Goes Nuclear - Controlling a Nuclear Power Plant
28:09
ZX-81 memory mod, case & keyboard restoration, test-drive (Pimp My Eight, episode 4, part 3)
13:46
ZX81 Classic PC
1:06:03
ZX81 Review Repair and Conversion - Part 1
15:21
How to install a ZX81 16K Ram expansion - 10 minute mod!
22:47