Video prompt: The crisp, cold air fills their lungs as they laugh and chat, their breath visible in the chilly atmosphere. Each person carries a bright inflatable tube or a sleek, wooden sledge, their vibrant colors contrasting against the pristine white snow. The slope is bustling with activity, as other groups of people, including families with children, make their way up, some slipping and giggling as they regain their balance. The sun is shining brightly, casting a golden glow over the snowy landscape, and the sound of joyful shouts and laughter echoes through the air. In the distance, the snow-capped mountains stand majestically, providing a stunning backdrop to this lively winter scene.
Defect: unsmooth motion ( motion is correct)