How to test your webcam to make sure it's working properly before a video call

You can test your webcam using online tools or programs that come with Windows 10 or your Mac computer.
Business Insider

How to start a Zoom test meeting to make sure your computer or phone is working properly before an important video call

Quick tip: If your camera is off, you may need to click the Start Video button in the bottom-left corner of the app to turn the camera on. How to start a Zoom test meeting on a mobile device You ...
Android

Vivo X200 Ultra Falls Just Short of DXOMARK’s #1 Spot—But It’s Still a Camera Beast

DXOMARK has put the Vivo X200 Ultra through its rigorous camera test suite to measure the phone’s performance in photo, video, and zoom quality from an end-user perspective. The phone has claimed the ...