As an obsessive arcade retro-gamer who custom built a high-end emulation cabinet with a 27-inch quad-sync analog RGB CRT - I approve of this video! As soon as he described running into the green pixels problem, I knew he was going to learn something interesting. Sub-pixel structure, phosphor chromaticity, etc are such a fun rabbit hole to dive down. And it's still highly relevant in today's OLED, QLED, etc displays.
Also, a tip for when you play classic arcade or console retro games from the 80s and 90s: they will look much better (and be more authentic) if you play on a CRT - or, if playing via emulation, just turn on a CRT emulation pixel shader (CRT Royale is good). These pixels are art which the original devs and artists intentionally hand-crafted to use the way CRTs blend colors and scanlines anti-alias naturally. You deserve to see them as they were intended to be seen. Just look at what you've been missing: https://i.redd.it/9fmozdvt6vya1.jpg
Also, a tip for when you play classic arcade or console retro games from the 80s and 90s: they will look much better (and be more authentic) if you play on a CRT - or, if playing via emulation, just turn on a CRT emulation pixel shader (CRT Royale is good). These pixels are art which the original devs and artists intentionally hand-crafted to use the way CRTs blend colors and scanlines anti-alias naturally. You deserve to see them as they were intended to be seen. Just look at what you've been missing: https://i.redd.it/9fmozdvt6vya1.jpg