An FFGL effect that finds the outlines in a clip and scans them the way a laser projector does, with two galvanometer mirrors chasing a point stream at a fixed rate. The bright dots at the corners, the corners rounding off at speed, the ringing and the crawl on a frame too busy to finish are all where the beam went, not things drawn on afterwards.
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.