People creating interesting visuals in a very, very small computer program; often with some artificial constraints. Often it was put together with cracking scene, I guess the skills involved used to be similar (lot of low level hacking?).

My personal involvement with this scene is nil - I always just saw some interesting thing playing with crack.exe that I got from some dubious source, thought "huh it's neat", and went on with my life.

I have no idea what are the constraints do they have in 2025, or what platform do they even target. How are you gonna do demos on iOS that's all locked from top to bottom and you can't even run anything without involving Apple in the process?