Can I set a background image to use when making video calls/meeting in Teams?

To use custom backgrounds in Microsoft Teams, you'll need to use the desktop version of the app

• Initiate a video call.
• On the call screen, click the More Options icon
• Select the option for Show Background Effects
• Select your preferred background and click Apply 

If you would like to use Aberystwyth University backgrounds they are available here: Corporate backgrounds for Aberystwyth University 

It will give you the chance to preview the background before making it visible to others.

Select the images that are the correct way around. It will appear mirrored as the camera is reflected in the preview, any others will see this the correct way around.