Any kind of incidental contact that occurs in the "natural course of play", i.e. scrums and, you know, every sort of scrimmage-blocking situation is something that never gets called as a "leverage" situation. As I said above, if we remove any sort of grey area then any time a defender attempts to push the pile to stop and/or bring down the runner it's a penalty. Nobody wants that and we all know it doesn't make any sense to view the game that way. "Pushing" in and of itself is not a penalty. "Lifting" in and of itself is not a penalty, either. It'd be one thing if Brooks wasn't engaged with a blocker and LVN hurled him into the OL or grabbed him by the waist and picked him up into the air, but that's obviously not what happened.
Go back and watch the rear angle, you can look at it frame-by-frame. Brooks is lined up on the A gap, LVN on the B gap, they both crash inside. The lines are already fully collapsed into each other and Brooks is completely engaged with the OL...AND the ball's snapped and Santos has already started his run-up before LVN manages to find himself behind Brooks and gets his hands on his back. Is anyone really going to argue that LVN's contact here is non-incidental and something that wouldn't regularly occur in the course of play? Of course not. Is LVN simply not supposed to attempt to block at all at this point? It makes no sense. There's no sensible call to be made here.
And as has been said ad nauseam at this point: Eberflus isn't saying anything about "illegal pushing" or "lifting". He's complaining about the DL lining up on or "being on" the LS too quickly, which obviously isn't the case.