For all that have requested it, I found a decent YouTube video of someone performing the 24 posture Yang form and it's shot from behind! (I can't post it here so you have to follow the link.)
Below are interesting videos from YouTube including video from some of my teachers.
Above: Cheng Man Ching
Above: Cheng Man Ching
Above: Cheng Man Ching sword form
Above: Wilson Pitts push hands
Above: Roberto Sharpe