An FFGL effect that's a small video codec (block-matching motion search, closed-loop prediction from the decoder's own last frame, a quantised DCT residual and a GOP) with controls that break one stage at a time. Datamosh is what a decoder does with the wrong information: drop the I-frame at a cut and it paints the old picture with the new scene's motion.
This demo runs the plugin's shaders in your browser, so it needs JavaScript and WebGL2. The plugin itself, its source and its downloads are on its repository.