Use @Video1 as the base video and @Image1 as the head identity reference.
Completely replace the man’s head in @Video1 with the exact head from @Image1. Strictly preserve facial identity, head shape, hairline, beard, skin texture, and natural proportions. Accurately match head movements, angles, lighting, shadows, and neck alignment frame by frame. Preserve the original body, clothing, background, voice, and lip-sync. No face blending, beautification, distortion, flickering, or identity drift.
Priority: 100% identity preservation, seamless integration, photorealistic 4K output.
