Film it: locked camera, two non-overlapping takes, Log profile
how-toIf the camera moves a millimetre between takes, no mask will save you.
The script is identical in all five lessons. Step one: tripod 'or any stable surface' - the camera must stay 'completely still for the entire recording'; movement makes alignment 'much harder.' Step two: plan the movements - decide what each clone does (sit, stand, talk to the other) before rolling. Step three: record each version separately - stand left, record a few seconds, stop, move right, record again - and keep track of where 'your other self' was so the two never overlap the middle of the frame, because a crossing body makes the mask much harder. Shoot in a Log profile so the footage is flat and grades cleanly with a LUT. In practice the longer/first take becomes the bottom layer and the right-side performer goes on top.
Every social clip Paul shoots for a client that needs 'two of me' or 'talking to myself' starts with these four rules.