Mirror My Video Apparently Means Mirror Everything?

Most users expect Mirror My Video to mirror only their camera video, while leaving the virtual background exactly as they uploaded it.

However, when Mirror My Video is enabled, Microsoft Teams also mirrors uploaded background image.

So someone on MS Teams Team really thought:

"The user will anticipate this and manually reverse their background images, then upload the backwards image so Teams can reverse it again!"

We wait in earnest to find out if the next Teams patch will drop all pretenses and just mirror the entire display, including on screen text, menus, and the Windows Start bar.