Homekit Secure Video support
**Is your feature request related to a problem? Please describe:**
Apple published their own cloud based storage for the video recording with facial recognition feature of top of it. Would be great to extend the plugin to support that for Unify Protect cameras/doorbells.

**Describe the solution you'd like:**
Apple has not published any non-commercial documentation regarding the specification of the HomeKit Secure Video support, but there are unofficial reversed engineered documentation:
https://github.com/Supereg/secure-video-specification

**Describe alternatives you've considered:**
Setup a server with python face-recognition module plugged in to some RTPS stream of Unify cameras.

**Additional context:**
N/A
