So Jussie must have meant for this to be on a security camera, otherwise you don’t need to rehearse it and act it out and wear a red hat. So they must have screwed up on the location.
Jussie must have been stunned when he took the police to the spot and realized the camera was pointed in the other direction, and the performance was not recorded.
You are right, they were wearing ski masks and probably gloves and he knew the cameras wouldn’t pick up the color of their skin.