Its not just a document camera that you can use your iPhone for when on a Zoom, MS Teams or Skype call. It can also be as another camera. But here I show you how to use it as a document camera but you can just do the same if you want to use it for something else. That something else could be an extra angle when you are teaching cooking, music, science or anything else where another view could be useful. I find it useful when I am teaching.
So I have this ring light that has a smartphone holder that I use and recommend for filming, they are reasonably priced and give a nice light too. Then I was using my iPhone as a second camera to get close ups and did this often in Zoom, Teams and Skype. It then seemed obvious to use the ring light that can be angled along with the smartphone so that I point it in almost any direction.
If you want to show something from a book or perhaps something else then you can have it on the desk next to you and the smartphone can be looking down or maybe from the side. Then you can switch the camera.
For my iPhone I have used two different apps, both free and can be found on the App Store, NeuralCam Live and Elgato EpocCam.
Here is a video I made to show you how it works.