[wakeupthedawn]

Watch carefully at around 1:15. When the camera comes is shot behind the designers, the envelop is not on the table. It is still in Derren's hand, as it should be. When the camera view switches to the one from behind Derren, the envelope (or whatever that is) is already seen to be on the table. Then it switches back to the view behind the designers, and he has it in his hand again and finally places it on the table. There's lots of other shading editing throughout.