An FFGL effect that puts your clip through the kind of box that turned 625-line, 50-field pictures into 525-line, 59.94-field ones, interpolating fields in time and in space with no idea of motion at all. The judder cycle, the double images and the soft vertical look all come out of that.
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.