This is obviously a big budget rig from professionals. It is a collaboration between Wired, Youtube, The Stan Winston school of arts, and Conde Nast Entertainment. I’m guessing the actual work was done by the Stan Winston folks.
It is 9 feet tall and you can see that there is a person in there, in the middle section. The ancient trick of connecting the extra arms with rods is in place here, but you can also see that the head appears to be motorized and feeding a display that the operator can use.
There’s supposedly a mini series coming soon showing how this thing was built!