The steering wheels' hubs rotate in two directions. The steering action rotates through a vertical axis while the typical suspension rotates in a front-to-back axis pinned approximately through the other side of the car. So unless they abandoned common suspension design to let tires lean in turns more than a reasonable amount, there needs to be an allowance for angular deflection. A pinion gear arrangement sounds like it would take up a lot of the space they're trying to save but still not solve the multi-axis problem found at all 4 wheels. I'm trying to not take their video so literally but it's not like it's a dealership rep spouting incomplete info here