Funny thing - the video is actually 30 FPS (to check, right click -> stats for nerds). You need to be running at 80 FPS to display a 40hz pulse (intuitively, ea

Funny thing - the video is actually 30 FPS (to check, right click -> stats for nerds). You need to be running at 80 FPS to display a 40hz pulse (intuitively, each black-white cycle takes at least 2 frames to render).