Ideally you want the camera to be able to “see” everyone at the table - this might take some fiddling with the position of the device & wear everyone is sitting.
Use a video call service to call the other person. Popular services include:
Be sure to give yourself 5-10 minutes to test the camera/ microphone etc. It will be easier the second time around.
That’s it really. Bon appetit!
Bigger screens are better - you could use a computer monitor or TV with a webcam.
There are wide angle webcams which will give a fuller view of the table.
You can adjust the camera in some video call software. For example Zoom uses a close-up angle by default - turning that off gives more visibility.
Try & make sure your screen & camera are backlit. Face the camera away from windows, rather than towards them.
I’m going to be experimenting with different setups & will report back if I find anything outstanding.