Realistic Event Face Swap

I’m producing a 4-minute video for an internal event and want the two main characters’ faces replaced with the faces of two colleagues. The swap must track movement, lighting, and expressions—so something beyond a simple still-frame overlay... (Budget: $15 - $25 USD, Jobs: After Effects, AI Animation, AI Content Creation, AI Video, AI Video Editing, Animation, Video Editing, Video Post-editing, Video Production, Video Services)