Definitely shaky but looks like either a handheld camera or the guy was on the camera while on the tripod. You can see the edge of the table moving even before the slight camera move. I can't imagine any reason to design that in. That is why for machinery that spins and needs to produce accurate results like skate sharpeners but also woodworking machines, heavier is better. Guys covet and will go to great lengths to restore old planers and jointers because they are massive and weigh a ton.