This is done by trained ballet dancers...I was watching not just the arms but when they finish the position of their legs....and they were wonderful...
Honestly this is so clever!! I understand how it can be funny, but it’s also a great way to still do the choreography without putting young dancers through the physical pain of the routine or if the quad isn’t ready for that difficult of choreography yet. But this is still very complicated and requires precision and synchronization. I also like how from afar, it looks like they’re little swans with the fluff on the collar and the little arm legs!