Settings alone won't fix poor environments. Use these expert tips from reviewers at Caleb Wojcik and WebFX :
: Auto-exposure causes the frame rate to jitter as it adjusts to movement. Turn it off and manually adjust the exposure slider until your image is clear and smooth. Webcam Setting 1.2.1
If you are looking to optimize your webcam quality using manual controls, here is helpful content to get you started: Essential Manual Adjustments Settings alone won't fix poor environments