Floral VFX Video Background Swap

A studio talk-show episode has already been shot; multiple cameras capture a host and guest standing. I now need that set turned into a vibrant floral garden (yellow, oranfe and red flowers) under a clear blue sky, complete with grass replacing the floor and a warm sun in the distance.

Here is the link of the footage. Background mush be changed tand consistent theoughout while length of the video : https://www.dropbox.com/scl/fi/f38ixsydlhv3ejx1bj5iv/Video-2025-09-16-2-21-57-PM.mp4?rlkey=75ogndykt3cbumm46sx685pqd&st=nip9phjl&dl=0

What must stay exactly as-is are the people, their clothing, all camera angles and timing, and the white podium’s position. Host and guest appearance is the single most important element, so fine-edge hair detail and natural skin tones have to survive the roto and compositing work untouched.

Your task is to remove the existing walls and floor, track each shot, and composite a believable garden environment that respects original lighting, shadows, and depth. AI-assisted rotoscoping, VFX keying, or a hybrid pipeline is welcome as long as the final render is seamless.

When you respond, please include:
• A link to a previous project where you executed a similar background or environment replacement.
• The specific tools you expect to use (After Effects, Blender, Stable Diffusion, Runway, or anything else in your toolkit).

The finished sequence must match the source resolution, frame rate, and duration, ready for immediate broadcast.