I work in the electronics manufacturing industry and have been to China several times...the video and assembly methods look standard. China has the right mix of low labor cost and high tech assembly (notice the solder paste screen printer, pick and place equipment, and reflow oven). However, the volume of units coming off the line is low (relatively) that it would make economic sense to hand-fold the boxes. I'd be interested to know where the factory is located.
Don G.