I think the common theme in this video is repetitive or cyclical motion. At first, I was thrown by the moon at the beginning and the end, but upon further thought the moon completes a lunar cycle every month so that would fit with the videos theme. The leaves swaying in the breeze and the monk ringing the bell are also cyclical motions as they swing back and forth repeatedly. Additionally, the woman jumping up and down is another example of cyclical motion. Finally, the men spinning in circles are completing a full circle which is another example of a movement that repeats itself.