I agree that the best and only way to learn is through experience. I didn't find exactly what I was looking for on youtube, and my having dial-up is a bit of a handicap to search as much as I wanted to :( I was looking specifically for someone working with a wild horse on Day 1 without any tools, someone very soft and just using subtle body cues which really are best taught by someone who knows them inside out.
Here's an example of a young gal who's using cues you won't notice at all unless you learn by doing, and she's pretty good for a novice:
What I noticed is that she could have had that horse a lot quicker if when she stopped and he responded and faced her she had turned off the pressure and turned in the other direction and taken a few steps, he was right there and more willing to connect than I think she realized, but instead she used more pressure and he wasn't so happy about that. Otherwise she did a pretty nice job.
In the 6th minute of her video she turned his butt round using eye contact and subtle body cues. No book or video is really going to show you what experience can, but this may give you some idea on how subtle it is and how it should be when done right. Sure hard to find a good example on youtube :(
I only watched this one video of hers so far and interested in seeing how she progressed with him.