Yeah I saw that video too and thought, well that didn't work out well lol
But Stadthalle just has a bad sound due to the weirdly shaped ceiling and general room shape, no matter what kind of magic they are doing. One of my friends is FOH tech (a very experienced one) and I was there once when he mixed a band there and he struggled so much to make it sound half decent during soundcheck. Thing is, sound just completely changes again once the room is filled with people.