surface fluency

What you are watching is the invisible calibration loop operating in real time. The engine compares every frame of source content to what the camera sees, computes per-patch optical flow through a three-level pyramid, and refines the warp grid accordingly. When the warp converges, the residual between source and captured drops to near zero and updates subside — the engine has learned the surface, and it simply holds it there. No scan button was pressed to produce this.