Since the issue pertains to the Camera app, the first thing you should do to remediate this is to run the Camera troubleshooting utility. You will find the option for this in the Windows Settings.

To use this app, open Privacy settings, and change settings to allow this app to use your camera and microphone. If you need it, here’s the error code: 0xA00F4245 ...

Fix the missing Camera Roll folder on Windows 11 in a few easy steps. Learn how to restore it manually or via settings.

If your camera isn't working in Google Meet, there are several ways you can troubleshoot and fix your video in the app.