An FFGL effect that forces your clip into 16 colours or fewer, the way an 8-bit machine's screen would have shown it: the Commodore 64, the ZX Spectrum, the NES, the Game Boy, CGA, the Amstrad CPC, PICO-8, teletext or the Amiga's Workbench, a palette you type, or one chosen from the clip. The picture becomes a grid of colour numbers and a small colour table, as it was on the hardware, so a palette swap, a fade and Deluxe Paint's colour cycling are writes to the table while the picture underneath stays exactly where it was.
This demo runs the plugin's shaders and a port of its CPU half in your browser, so it needs JavaScript and WebGL2. The plugin itself, its source and its downloads are on its repository.