Hi Paranoidsheep, as additional information, unfortunately, the toggle off self-view is not yet part of the feature of Microsoft Teams as of the moment, there are lots of people also raising these concerns as the image is static on the bottom right side corner of the video.

How do I hide myself in Microsoft Teams?

Go to a team or channel name and select More options > Hide. Find out 13 cool things about screen sharing feature while hosting or attending a meeting using Teams.

Can you see yourself on Microsoft Teams?

Pin Yourself in Teams Using the Camera App

Disable your camera in Microsoft Teams. Open your computer's Camera app. Return to Teams, and share the Camera app. Your video should now appear on a larger section of the meeting window.