Just sitting and looking at the sky one doesn't see the motion. There are a few streaks, but mostly they are too quick to focus on. When you look at individual photos, you might see a streak, or you might not. Put them into a movie, however, and you see all sorts of things you didn't notice before. Our eyes are good at spotting motion.
Best experience is to watch it on Youtube, but not full screen.
As a bonus, here's a single frame from the movie. Or rather, one of the photos used to make the movie. Look for the parallel streak, that's why I edited this image in the first place.