IBM CGA Graphics: Composite Video and Artifact Colors
The 8-Bit Guy · Explainer · YouTube title: CGA Graphics - Not as bad as you thought!
Why it's here
HN recommends it for showing how old developers exploited the smeary nature of composite signals and what CGA really looked like on period hardware.
What it covers
The 8-Bit Guy covers IBM's 1981 CGA graphics system, including how composite output and artifacting produced extra colors beyond the nominal palette. He argues CGA looked better in period than it does on RGB monitors.