Okay, these make a lot more sense after watching the video.
One thing I'd say is to push the forms more and make them into complete shapes. Right now it looks like your loosely drawing the shapes and then focusing on the contour of the body. I would make it look more like a mannequin and focus on the shapes more.
Also, the shoulder blades are a little small.
The overall proportions are good and I think you really captured the illusion of volume!