Does anyone know the name of the Russian choir song at minute 16 of the documentary? I want to use it for the background song when individual factions reach the

Does anyone know the name of the Russian choir song at minute 16 of the documentary? I want to use it for the background song when individual factions reach the Factory in Scythe (parallel universe board game). https://youtu.be/tICL-lwI7KM?t=930 https://youtu.be/tICL-lwI7KM?t=930 One piece of software I am very impressed by is Dmitry Shkarin's Durilca, a very fast and efficient file compressor, topping the benchmark charts. I wonder what he's doing now. And if I'm not mistaken Eltech's Exagear (close to native i386 binary emulation on Arm) was made by Russian programmers too.