To test and troubleshoot your camera and microphone, select the link that corresponds to the platform you are using.
Google Hangouts: https://support.google.com/chrome/answer/2693767
MS Teams: https://support.microsoft.com/en-us/office/my-camera-isn-t-working-in-microsoft-teams-9581983b-c6f9-40e3-b0d8-122857972ade
Zoom: https://support.zoom.us/hc/en-us/articles/201362283-Testing-computer-or-device-audio