Videos are already 4D. There's the 2D frame and the time dimension. Then there's the structural information conveyed by motion, parallax, scene composition, ca

Videos are already 4D. There's the 2D frame and the time dimension. Then there's the structural information conveyed by motion, parallax, scene composition, camera movement, etc. That's why there's the 180 rule, amongst other things. Algorithms can take a video and turn it into a 4D volume. As can our brains.