HP Elitebook Camera Shutter
https://www.youtube.com/watch?v=G9x7P5njCmQ
If you are joining a Teams meeting and your camera shows a black screen, please check the shutter above the camera to make sure it is not closed. A video was added above to show you how it works.
Depending on what application you are using, you may also need to allow or enable the program to use your camera. Sometimes there are drop downs before joining a virtual meeting that allows you to set microphone and camera. Here is where you would select your HP built in camera.
One of the most common issues with HP cameras is the shutter being closed. If you are getting an error on your screen when selecting the camera then that is a software issue.