I've never written anything out but I love making dance vids! I'm sure there's lots of strategies but I largely focus on motion matching to mimic the idea of dancing. As in, matching the motion of the people to the clip that came before and after it, to make a full story of someone twirling or moving across the screen from the clips together. I do it a lot in this vid, for instance. I'm not sure how to help with rhythm stuff, I mostly just count it out lol. But a dance vid sounds awesome, good luck.