What would be a good source of knowledge for learning to use an AR-15 pretty much from scratch? I am looking for as much as possible a turn-key solution, a single easily understood source, with a preference to a DVD as opposed to a book or something. (A DVD makes it easy to go over the material as we can just watch it during one of our movie nights.)
The target audience has thousands of rounds through AK's and 1911's, knows how to shoot, but has only recently bought her first AR and seems to still be a bit uncertain about how to run this gun properly and how everything works. I've taught what I can, but I'm equally new to the platform myself, and a lefty to boot, so not only is my own knowledge base somewhat limited, I don't always know how a right-handed person should do things. And it seems my skills as a teacher are somewhat limited, as well. (For example, until today she didn't know the dust cover opens automatically when you fire the gun. I'm pretty sure I've explained this to her, but apparently not very well. Hearing these things from another source might work better.)
I realize personal instruction would work better. Unfortunately, good classes are pretty rare around here, and those tend to get expensive, so that is unfortunately not an option for the immediate future.