This feature allows developers to pan and tilt the camera using media constraints in getUserMedia(). https://w3c.github.io/mediacapture-image/#dom-mediatracksupportedconstraints-pan https://w3c.github.io/mediacapture-image/#dom-mediatrackcapabilities-tilt
Many cameras have the ability to pan and tilt which is specially useful in the video conferencing(WebRTC), like steering the camera to the speaker, etc. Chrome has been using a private extension to satisfy this use case. Implementing this feature will allow developers to use this feature in a standards-compliant manner using media constraints in getUserMedia().
Docs: https://web.dev/camera-pan-tilt-zoom/
Samples: https://ptz.glitch.me/ https://github.com/riju/WebCamera/tree/master/samples/panTilt https://webrtc.github.io/samples/src/content/getusermedia/pan-tilt-zoom/
Explainers: https://github.com/w3c/mediacapture-image/blob/master/ptz-explainer.md