Na, not really. It's the other way around.
In one recent video he was talking about how the Imperium was unable to build Hive Cities and that they most likely are a relict from the Dark Ages of Technology.
How the Imperium builds Hive Cities is described in Horus Heresy 11 (for 30k) or Gaunt's Ghosts "Necropolis" (for 40k).
Luetin is Warhammer's Carl Benjamin.
I enjoyed him before I actually started to read the novels for myself, he kinda brought me into 40k, that's true, but a lot of what he says isn't what is described in the books.