Yeah, usually you bolt the racks to the floor. Believe it or not he's not the first guy to hit them with a machine. His bosses need to be put in front of a firing squad.
You can't really tell from this video if they were bolted down or not but either way I don't think it would have made much difference. A 700 pound vehicle, even if its going 5 MPH, can do a good bit of damage if you ram it into something. Just enough to bend that bar and bring everything down.
Oh and before somebody who knows what they are talking about shows up I want to say I just made up the 700 pound thing. Sounds about right but I don't know for sure.
Actually they were probably bolted but it looks like they weren't using strong enough beams for the weight of the product. In any case warehousing isn't a new science, I work at one and I can tell you for sure that that sort of collision wouldn't have brought the whole place down.