Yeah that is lovely. The kind of tank I'm aiming for, really packed with a lot of corals that add movement, etc.
I think that there's no conflict because there's not really many competing corals in close proximity. It looks like next to aggressive LPS, he's got zoas, palys, mushrooms, etc, things the LPS won't attack. I might be wrong but from looking at the vid, I can't really see any LPS in close proximity to any other similar LPS or SPS.
I don't think it's set up for the video, there's plenty of tanks as packed if not more packed than this out there.
In packed tanks, sometimes you do get turf wars, but that's just what keeps corals at bay. There's a small element of that going on in my tank, where that big leather which grew from a white dot where I ripped off the original colony is being stung by the encroaching green star polyps and that's changed the leather's shape.