How to use an iPhone as a 2nd camera in Zoom
Updated: May 19, 2020
Here's a brief video tour ( 2 minutes 10 secs) of my basic camera setup for online piano lessons:
It features the EpocCam app.
UPDATE (19 MAY 2020): After Zoom software version 5 was released, it was reported that EpocCam did not work with Zoom. The manufacturers of EpocCam (kinoni.com) have since released some instructions about how to solve this problem.