Help with "Simple" Baby Cam Setup

I am looking for some help connecting the dots with the configuration of a camera in my children room.

Following the exciting messages about video streaming I decided to have another go at configuring a camera into HA I bought an Onvif one specifically for the task.

I haven’t used HA in a while and a lot has changed, I tried adding the camera as I had done previously and I couldn’t get it to work.

The process I was going through was to add it as a generic camera:

In Configuration.yaml

camera:

still_image_url - “The URL your camera serves the image on” Does this mean the HA Server / The Camera IP or something else?

stream_source - As above…

As the first step is there any way to validate that it is created correctly?