mdsahilparvezai/invisibility-portal ? reverse-engineered prompt

Build me a small Python app that uses my webcam and makes it look like I can disappear or become invisible in the live video.

I want it to open the camera, let me choose from available cameras if there is more than one, and then show a real time video window with some kind of invisibility style effect based on hand movement or body placement. If the hand tracking model file is already there, use it. Keep it simple and fun, and make sure it actually runs from one main script.

Please include clear setup steps, install what is needed, and make the app easy to start. If anything is missing or unclear, check current docs online if you need to. Also add a small helper script or function to list cameras, since that seems useful for this project.