The presentation was for a commercial system with a Mash-lauter tun, I assume. I do remember the V wird Part, so think false bottom. Courser crush, to a point, is desirable. Some homebrewers use false bottoms, so this applies.
How about a braid, or a BIAB system? Finer crush is the way to go, according to many. The Lauterung Dynamics are different, flow is to a point for the braid. The bag let's the liquid out over it's area when pulled.
Big breweries with a mash filter use a hammer mill to make flour. The husks are discarded, as their filtering action is not needed. Efficiencies >100 % can be had, as the standard is the Congress mash which is not squeezed.
My $0.02 is optimize for your system. Your optimization may not work for someone else.