hey, Ali, I just learned about your video and guess what! My left leg does the same thing if I sit still too long. My toe is not as talented as yours, not ready to go solo, I suppose. You know that I have MS, and this started a couple years ago for me. I'm 45.
I will try to get a video of mine so you can see it in action. I should warn you, my leg and foot aren't nearly as cute as yours.