Before I start talking about capturing equipment, I would like to draw your attention to various video-saving media. These media can be divided into analog and digital resources. Various magnetic tapes, including VHS and Hi8, are examples of analog-storing media. In these resources audio and video data are stored in the form of magnetic fields on a ribbon or positive film. Their quality will degrade with time and we need to digitize them in order to prevent losing video quality.
Digitizing is the process of capturing movie data from an analog source (like old movie media or a TV channel/ satellite receiver), converting it to a series of zeros and ones, and finally saving this on a digital media like CD or DVD.
Other than maintenance of movie quality, is there any advantage for capturing analog movies? Yes. Consider the size of a VHS cassette and compare it with a CD or DVD. Can you imagine the space required for you to archive 100 movies as VHS? Now imagine...