Hey all, was just watching a video by Displaced Gamers on Youtube about dithering on the system [https://www.youtube.com/watch?v=3yQnY5GHI] and was wondering how easy would it be for someone with not much knowledge in coding to make a basic dither shader similar to what the PS1 does.

I'm not asking for someone to go out of their way to make one, I mainly just what to know if it's possible and if there are any guides or information out there that can be useful to learn from to achieve this effect.