- it creates a 3D model of you based on the first second of your body in the video. How the video is recorded does affect how the 3D avatar looks.

- don't have that functionality but its really easy to implement.

- ideally, it works for anything. I will attach some outputs of it climbing outdoor routes. The model doesn't know what a wall means. It just has seen enough data of people climbing that it can somehow correlate certain features in videos to certain human movements.