Camcorder sales may be down, but amateur video is way, way up, thanks to the cameraphone, YouTube and other developments. David Pogue, New York Times tech columnist, takes you on a fast, funny ride through the entire process of becoming a home-movie mogul: choosing a camcorder (tape vs. DVD vs. memory card), learning to use it, editing out the boring parts, and finally posting the result on the Web for a potential audience of 1 billion people.