Replace ONLY the background of the original video with a…

Replace ONLY the background of the original video with a photorealistic street in New York City, featuring authentic NYC buildings, sidewalks, and urban atmosphere. STRICTLY preserve the original person, facial features, hairstyle, skin tone, clothing, body proportions, pose, gestures, and all movements. CRITICAL: Keep the laptop in the person's hands completely unchanged. Preserve the exact laptop model, size, shape, position, angle, screen, and every detail of the presentation displayed on the screen. All text, images, slides, graphics, colors, layout, and content on the laptop screen must remain pixel-perfect identical to the original video in every frame. Do not regenerate, redraw, replace, blur, distort, or alter the laptop or its screen in any way. Preserve the original camera angle, framing, timing, perspective, and movement. Only replace the environment behind the person with a realistic New York City street. Match the background lighting and perspective naturally without changing the foreground subject or laptop. Ensure seamless edges, stable tracking, and no flickering. No additional people or objects overlapping the subject or laptop. The foreground, including the person, hands, laptop, and presentation, must remain identical to the source video throughout the entire clip.