The one thing about iPhones is that they have really good cameras and those on many Macs are not that great, wouldn’t be great if you could use your iPhone camera instead of your built-in webcam. Well you can, and the one I have been using recently is NeuralCam live, https://apps.apple.com/gb/app/neuralcam-live-smart-webcam/id1524933155. It connects using the same USB/lightning cable you use to charge your iPhone and it works really well.
I like it because you can position the iPhone to get a good angle, and you can move the iPhone to show something close up, really useful for teaching. It is also better in low light.
The app is really useful as it helps set everything up as you do need to run a small file on your Mac and it helps you do that.
Here’s a video I made to show you how I set it up, you will see I used a small tripod and a smartphone holder. Below the video are links to where you can find them.
Items I used in this video.