Several threads on this subject.
One thread was called "videos and casts." Several more on this nature on past threads. (use the boards 'search feature' and put in video spey casts, or some combo of this). Sorry, I couldn't get the url to cut and paste for you.
Several very good video's on the 'how to' of spey casting available now. An old one of these and Hugh F's book were by initial "training wheels" back in the late 70's-early 80's.