They seem to be careful not to show a large object like a plane crossing the "seams" that appear in the video (similar to the seams in satellite imagery on maps where they've patched together data from multiple passes / satellites). When you see the cars on the freeway they seem to disappear at the seams. Does the camera have to be focused on an area the size of the blocks they show? This is still very impressive - I don't mean to downplay the technical achievement, but I'm just trying to get a realistic sense of where the technology is at. I suspect this is video overlaid on static images.