He's talking about saccadic eye movement, using the slideshow as a metaphor to explain how our eyes discard information during the saccade, which is pretty accu

He's talking about saccadic eye movement, using the slideshow as a metaphor to explain how our eyes discard information during the saccade, which is pretty accurate as far as I know. The phrasing was confusing but I don't think he meant to imply that we see a slideshow all the time, just when our eyes are moving/scanning a scene.