What light stand head is he using on his Key light in this video. It's 14:31 in the video. It looks like its real flexible and fast for moving the light around.
www.bhphotovideo.com/c/product/151751-REG/Red_Wing_RD1100_Compact_Boom_Assembly.html
The advantage he gets from it is that the angle of the light source is unaltered when he rises or lowers the source.