How to Turn Your Smartphone Into a Webcam
You’re maybe using video calling software a heck of a lot more than you were, say, a month ago—and you don’t want to be the only remote worker out there without a video feed to your name. If your home computer setup doesn’t come with a webcam built-in, then you can use the camera on your smartphone to plug the gap.
https://gizmodo.com/how-to-turn-your-smartphone-into-a-webcam-1842783844