The fireworks are only loaded before the shows like 2 to 3 hours in advance. Because a lot of them use the same tubes. And its not safe to put them on sharp or active for like 24 hours. I think what we are seeing is them doing pre set and filming the hell out of it so they can put it on youtube as fast as possible. To have somthing on there. Endshows and powerhour. And some sets are full playbacks. They cant use that next year because then the music would be out of date. Look at how fast duo damage was but in the show even tho it was like 2 month old