The North Korean Mass Games is the largest choreographed gymnastics display in the world, it includes a lot of Rhythmic Gymnastics. An incredible spectacle:
YouTube – North Korean Mass Games
The footage is from the 2004 BBC documentary “A State of Mind” which followed the daily lives of two North Korean schoolgirls as they prepared to perform. heres some more:
The BBC trailer and an excerpt from the program which explains whats going on.