I will remove or replace object, person in video

Remove the selected person or object from the video and naturally fill the background so it appears untouched. Maintain original lighting, shadows, reflections, textures, camera movement, and scene consistency. Ensure seamless frame-by-frame tracking with no artifacts, ghosting, distortion, or visible editing traces. If replacing the object or person, integrate the new element realistically with matching scale, perspective, lighting, motion, and environmental interactions. Preserve the overall quality, colors, and cinematic look of the original video.