Although the pole mentioned in the video is interesting, for me the more prominent visual signal of the motion is another pole right near the center of the view

Although the pole mentioned in the video is interesting, for me the more prominent visual signal of the motion is another pole right near the center of the view. It starts out visible within the frame of the arch, near its right side. When the quake hits, this pole moves so far to the right that it's almost totally obscured behind the wall of the arch, and it can be seen swaying back and forth. Also, there is a pylon on the far right of the scene that seems to partially collapse. It's cool that we have this video, but sobering to remember that thousands of people died in this quake.