This is a fine place to start for someone that knows nothing about the guitar. Before you start learning the guitar you need to know a few basic things about the instrument and what different parts of it are called so you can understand later lessons. For example what is the fret-board or a single fret? You can watch the video or just go over the images further down which are stills from the video.
Showing you this in video-format might not be the best method so here are still frames from the video showing you all of the main parts of the guitar.