I agree with the comments above that a DVD is no replacement for an ASA or similar course.
Just before we took our first certification course, we did watch most of the DVDs about sailing at Netflix. By far, the best was "Sailing in Heavy Weather" (http://www.netflix.com/MovieDisplay?...d=13819925_2_0
), although it's not really for beginning sailors. (Worth seeing, though.)
"Sailing with Confidence" (http://www.netflix.com/MovieDisplay?...9&trkid=174833
) is probably the best they have for beginning sailors, although I'd caution you to keep your expectations as low as possible. It was fun that they were using a Rainbow 24, which I later sailed on the Chesapeake.
We also saw most of the Annapolis Book of Seamanship videos, and there were parts of the first that were enjoyable, but in it and others there were some relatively serious sleep-inducing sections.
Last, but not at Netflix, we saw a Learn to Sail with Steve Colgate video that was pretty humorous because it had some B-list hollywood actors as the sailing students. Love that "Big Hair" of the eighties!
So, some parts of the videos/DVDs were good at illustrating concepts, but don't try to stuff your brain too much before your classes.