Seamless Video Face Swap

I have a hours long video (webcam recording of me playing games on desktop from the side) in which I want to replace one performer’s face with another, keeping everything else—including dialogue, motion, and lighting—exactly as it is... (Budget: $250 - $750 CAD, Jobs: After Effects, AI Video, AI Video Editing, Artificial Intelligence, Deep Learning, Video Editing, Video Post-editing, Video Processing, Video Production, Video Services)