An FFGL effect that sends your clip as a Group 3 fax (ITU-T T.4) down a noisy phone line. Each scan line gets thresholded or halftoned to black and white, coded by a proper Modified Huffman or Modified READ coder, sent down a line that flips bits, and decoded at the other end, so the glitches are the ones a real fax makes. A bit error streaks along its line to the right edge and stops, in MR it smears down as a wedge to the next one-dimensional line, a receiver that spots a bad line repeats the one above, and in Page mode the page creeps in line by line at the baud rate, exactly as slowly as you remember.
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.