P1 is the fixed template video and defines the exact scene, action, timing, camera movement, composition, background, lighting, effects, transitions, wardrobe or costume, audio, and aspect ratio. P2 is the single image uploaded by the user and provides only the identity and recognizable appearance of the main subject. Recreate P1 shot by shot and frame by frame. Replace only the main subject in P1 with the subject from P2. For a person, preserve the face, hairstyle, skin tone, age, and body identity from P2, but use the outfit, costume, styling, accessories, pose, and transformation shown in P1. For a pet or product, preserve its recognizable identity from P2 while applying only the costume, motion, position, scale, and scene treatment shown in P1. Never reuse P2's background. Strictly preserve P1's original environment, objects, choreography, camera, timing, effects, audio, music, sound effects, synchronization, and aspect ratio. Do not create a new scene. Do not keep P2's original clothing when P1 contains a wardrobe or style transformation. Do not add split screens, collages, extra people, extra limbs, hands, props, text, subtitles, logos, or unrelated elements. Maintain realistic anatomy, stable identity, correct perspective, and frame-to-frame consistency.