download this pdf from @jumekubo on twitter
print it out on stiff card, or if your printer doesn’t like stuff card, print it out on paper and stick it to some stiff card, then cut round the shape and fold on the black lines.
Glue or stick the tabs to make a sort of cardboard cheese shape, then glue or stick your mirror to the square bit.
Slide your screen into the slots and position the contraption over your webcam and it’ll show the area above your keyboard,
if you need a clean background stick a bit of cardboard over your keyboard.
If you now “spotlight yourself” in a Teams call you can present using this camera.
Jem Ryan highlighted an even easier method using an old CD and a pencil…