Video prompt: A city park jogging track where runners of all ages maintain a steady pace, some sprinting and others jogging at leisure, amidst an atmosphere of health and community.
Defect: Deformation (any reason involved with a movement)
Explanation:  The person in the middle displays highly irregular leg movements while running, frequently landing with the same foot, while the other leg intermittently disappears. Additionally, a ghosting or trailing effect appears during the movement, creating an unrealistic and disjointed visual effect.