I tried to implement Johnny Lee's amazing idea (https://www.youtube.com/watch?v=Jd3-eiid-Uw) using mediapipe face tracking. I could not move much far using simple webcams since it was getting difficult to determine the distance of the face from the camera when the face was turned. I had an Inel RealSense 415 depth tracking camera from a different project and it took care of the distance thing at least. But the jitter thing had me stumped for a long time and I put the project away. With your ideas, I get the strength to revisit it. Thanks!