Dance - I'm glad you learned how to move with some relaxed joints, but I think you could've moved more quickly. Some of your moves were a bit random. Try to be more on your feet and keep using your feet to help you gain some force. (Like for a spin or just some more different stuff) The beginning looked a bit stiff since you didn't use any relaxed joints. The head spin was okay, but you could've used your arms to add more spin to it, and your arms looked a little stiff as well.
Dance2 - Well, I'll just say overall, it was way too slow. The beginning took too long. The backflip was okay, but you should try landing on both feet instead of your hands.
I don't have enough time to give more CnC, so I hope this helps.