McNeil - Pile Cast from Marshall Cutchin on Vimeo.
From On the Fly Productions , the same filmmakers that brought Once in a Blue Moon (the award winning film about New Zealand trout fishing), have put together a great instructional video on fly casting which can be found on MidCurrent. While there are many (bad) videos on how to cast and beginning casting methods, this video nails it. From the beginner to the advanced caster, you will watch this and learn something new and more important, useful. The above video is on a Pile Cast, which is a cast I use very often for dry fly fishing to difficult spring creek trout. If you are interested you can see more clips from this movie and purchase at Midcurrent