Movie Star choreography practice seen in reels

This is a choreography video I saw on Insta Reels.

Movie Star's choreography seems really easy to watch, but it's actually difficult.

Daniel is so light that he can jump around like a kangaroo.

How much practice do you need to do to dance perfectly in sync with a dancer rather than dancing alone?

I can only exclaim in awe as they synchronize every single movement.