[mediacapture-image] Include malicious sites and surveillance cameras in the PTZ explainer (#222)

beaufortfrancois has just created a new issue for https://github.com/w3c/mediacapture-image:

== Include malicious sites and surveillance cameras in the PTZ explainer ==
We should document in the PTZ explainer how the proposed API protects users against malicious sites and surveillance cameras in the explainer.

Let's use this issue to discuss how PTZ works today with the [Field of View](https://info.logitech.com/vc-tech-features.html#collaboration) and differences between mechanical and digital PTZ.

@reillyeon @riju @kenchris @eehakkin 


Please view or discuss this issue at https://github.com/w3c/mediacapture-image/issues/222 using your GitHub account