Setting up a second camera at the examinee's site

How do I have access to a 2nd camera (smartphone) at the examinee’s setting so I can access a view of their writing or pointing during tasks?

I haven’t tried it but…
I believe you will need to have a paid account, so that you can use the “group” option.
Then the second camera/cell phone could also sign in to your waiting room and you would add them to the meeting.
Because I have not tried this, I do not know how you would go about using screenshare AND the second camera. Perhaps with the picture-in-picture option?