Ok. If these integrations can answer some or all parts of your question.
https://community.smartthings.com/t/release-official-blink-camera-device-handler-with-motion-sensor-live-video-streaming-integration-with-smartthings-shm-temperature-signals-and-push-notifications/40535
https://community.smartthings.com/t/skybell-integration/16328
FYI, Skybell officially integrated with SmartThings and you are now able to added it directly in the ST app marketplace.