Ellen Soderquist talks about 4 distinct kinds of gestures and you can peek over the shoulders of artists as they do the various types of gesture drawings.
The Art of Gesture Drawing
Really fun game. Race to your page and run away.
Steve Aimone's Expressive Drawing Lesson
How loose can you possibly be when you draw?
Agnes Cecile's drip painting demonstration
Anatomy for Artists by Anthony Apesos & Karl Stevens
Great description of the elbow joint for artists
This book is in our library but I love the video better because the moving description is better than the drawings in the book. What do you think?
Anatomy for Artists: Man in Motion 2nd edition