There’s an annoying tendency among YouTubers to string what is usually a 10-second explanation into 5+ minute long videos with unnecessary gimmicks, putting th

There’s an annoying tendency among YouTubers to string what is usually a 10-second explanation into 5+ minute long videos with unnecessary gimmicks, putting the meat at the very end. TL;DW on stereopsis: 0) Both eyes are required for depth perception; 1) When drivers quickly check their left and right, the extremes are covered only by a single eye; 2) With neither depth perception nor secondary clues (like distance between the headlights in case of a car), the speed of an object coming directly at you is impossible to assess.