I made these two videos to walk you through installing OBS and DroidCam on PC and Android from start to finish in about 20 minutes so you can do good picture-in-picture video presentations on Zoom. Installing on Mac and iPhone would be similar: look for different instructions for OBS VirtualCam, Droidcam isn’t available for iPhone but there is similar software available for it.
And here’s a little guide to looking your best on Zoom:
– raise your camera to just below eye height
– don’t have bright lights in the background
– have diffuse, off-center light in front of you