A camera dolly is a wheeled cart or similar device used in filmmaking and television production to create smooth horizontal camera movements. The camera is mounted to the dolly and the camera operator and focus puller or camera assistant usually ride on the dolly to push the dolly back and forth.
Note that a pedestal move is different to a camera tilt, which means the camera is in the same position but tilts the angle of view up and down. In a ped movement, the whole camera is moving, not just the angle of view. In reality, like most camera moves, the pedestal move is often a combination of moves.
This change of focus is known as racking or pulling focus and in this case it is cued by Wendy’s comments about a missing vase piece. As the shot develops, Hope uses even more rack focusing and some subtle camera movement to bring another character into the scene.