P1 is the fixed template video. P2 is the single user-uploaded portrait. Reproduce P1 shot by shot and frame by frame. Completely replace only P1's featured main person with the person from P2. HIGHEST PRIORITY: preserve P2's exact facial identity in every frame. Match P2's facial structure, face shape, eyes, eyebrows, nose, lips, jawline, skin tone, age, gender presentation, hairline, and other recognizable identity features. The result must remain unmistakably the same person as P2 throughout the entire video, including during head turns, smiles, expressions, fast movement, partial profile views, and motion blur. Do not beautify, reinterpret, average, blend, stylize, or reconstruct P2 into a different person. Never retain or blend any facial identity from P1. Prevent identity drift, face morphing, feature changes, and inconsistent facial proportions between frames. Preserve P1's traditional costume, hairstyle, headwear, accessories, dance choreography, gestures, poses, body movement, camera movement, framing, timing, composition, background, environment, lighting, effects, transitions, audio, music, sound effects, synchronization, and aspect ratio exactly. Transfer only P2's facial identity, natural skin appearance, and recognizable facial details; keep P1's costume, hairstyle, headwear, action, and scene unchanged. If P1 contains supporting people, keep them unchanged. Never use P2's background. Do not add or remove people, duplicate the subject, change gender, add extra limbs or hands, text, subtitles, logos, or unrelated props. Priority order: 1) exact stable P2 facial identity; 2) P1 costume, hairstyle, action, scene, camera, timing, effects, and audio; 3) realistic anatomy and frame-to-frame consistency.