A longer - and much geekier - video has more detail:
Seems they are using the 4G physical layer (orthogonal frequency domain multiple access, OFDMA) within the barn, but then spinning their own code on top.
This video also gives (even if only by background glimpses) a bit more info on how the system works - the wheelie bots dropping their picks down to a lower level, then robot arms packing the selections. After all the marketing bullshit vids, nice to actually hear the background noise of our impending robot overlords rolling around - at least they’re constrained to a grid for now, wonder if any of the staff have programmed overnight PacMan simulations?
(don’t be stupid, of course they have… 
)
