Watching it right now, one thing that's probably important to understand about the difference between a Japanese and a Western presentation. Japanese preparation is about drilling the executions until they have it. While Western preparation, at least for concert types, is to have your setup, practice it, double check things in a sound check then roll out. I mention this because of the way they're blending the cameras. They didn't bring the AR Tech out, it's a large, flat, 2D projection. However, the 3D space stream stuff is from a stream of their entire run through and is all pre-programmed. The live shots are pre-programmed as well for timing and everything is sync'd.
The MC sections are likely live recorded from the rehearsals. At the HoloFes, my impression is some of the MC chunks are actually live rendered from another location. (I also just realized that HoloFes uses a live band because it radically changes the cost for the covers, lol.)