Use uploaded video P1 as the complete motion, camera angle, timing, scene, lighting and background reference.
Use uploaded image P2 as the only product appearance reference.
Only replace the product object inside the video with the product from reference image P2.
Preserve everything else completely unchanged: original environment, background, table surface, lighting, shadow direction, camera movement, every frame motion, video speed, audio, editing rhythm.
The replaced product must keep its original position, size, perspective, placement posture in the video scene, naturally fit the scene light and shadow, realistic texture, stable in every frame, no flicker, no distortion.
Do not change background, do not add extra objects, do not modify characters, do not alter scene layout.