Webcam not working on Microsoft Teams, installed via snap

You need to allow the access to the camera on Teams For Linux to be able to do videocalls, to do that you can use the Software Store in your Operating System after the installation of the snap. (snapcraft.io/teams-for-linux)

After the installation, you need to connect the camera to snap manually

snap connect teams-for-linux:camera core:camera

Goto Ubuntu software -> installed-> teams-> permissions-> camera on.