Scott Robertson talks about atmospheric perspective and how it affects the value structure in any image.

Check out the art documentaries channel on Youtube.

https://www.youtube.com/user/taran333tula/videos

Here's a Youtube page that features videos of model in poses that should be useful for practising figure drawing. There are non-moving views as well as rotating views, in short and varying duration of time.

There's nudity so you have to sign in to your account first.

https://www.youtube.com/user/onairvideo/videos