Real compression failure rather than a filter that resembles one: macroblocks carry motion vectors that keep being applied to a frame they do not belong to, so colour smears along movement that is not there. Transients are keyframes, and the picture snaps clean in patches.
Drawn with: a WebGL2 shader.
Reacts to and looks like: gpu, webgl2 and psychedelic.
Family: Visualiser.
Runs in your browser. The preview above is the same program the renderer uses.