A realistic video as if captured with an actual smartphone. ...

A realistic video as if captured with an actual smartphone. While maintaining the current image composition, a person naturally pulls a folding cart by hand. The shape, structure, proportions, number of wheels, and handle angle of the cart must never change. The cart rolls forward smoothly while maintaining its structure and position. The wheels rotate in firm contact with the ground, with only subtle vibrations from ground friction. The boxes and cargo on the cart are tightly secured with black straps, resulting in only minimal and natural movement. The background is a real-life sidewalk scene next to a road, where paving blocks, grass, and curbs show natural parallax movement consistent with the camera's motion. The background must not stretch, blur, or distort. The camera has only very slight handheld shake, as if filmed by hand, with no zooming or angle changes. The entire video maintains realistic lighting and color using natural light, without excessive sharpness or artificial tones.