Issues with Microsoft teams - video not working

Hi Swati2020 

Check if your camera is in use:

To make sure you can use your camera in Teams:

• Close all other apps that might be using your camera (like Skype or FaceTime).
• If you’re using an external camera, try unplugging it and plugging it back in.
• You can often save time and effort by restarting your device.

Make a test call:

To make a test call, select your profile picture, then choose Settings > Devices. Then select Make a test call under Audio devices. 

In a test call, you'll see how your mic, speaker, and camera are working. Follow the instructions from Test Call Bot and record a short message. The message will play back for you. After that, you'll get a summary of the test call, and you can go to your device settings to make changes.