Here's my character Pepe the Frog dancing "The dying Swan" using a video of a real ballet dancer and extracting the motions using Plask.
There are a few animation errors in the routing, blame my lack of skills and the body proportions of my character. no real footslide problems, only problems getting a short fat frog to do the dancing routine of a beautiful skinny ballerina.
Next project: ice-skating Pepe doing Yuzuru Hanyu's olympic routine.
Hint when using Plask (or similar) make sure the camera has a fixed position or be prepared to cut up your video.
https://www.youtube.com/watch?v=93qzHdXygYk