Indoor drumline (or winter percussion) is what this is. This particular group is RCC, based in Riverside, CA. Think of it like taking a drumline from a high school marching band, combining it with an orchestra pit, and putting both of them in a high school gym. I would recommend looking up "WGI Percussion" if you're interested in watching more shows like this. Some personal favorites are Pulse 2016 and RCC 2018
Not a big fan of the snare tuning, they need to crank those bad boys. Maybe add some chrome as well! Oh well, hopefully next season. Amazing show though.