Many people have old home movies or other videos lying around on VHS tapes. As time goes on, the quality of the video and audio on the tapes will degrade, because they employ magnetic storage techniques that are susceptible to degradation from repeated use and from outside magnetic sources. It can be quite easy, however, to convert these videos into digital files on your computer. As digital files, the quality of the video will remain the same as when it was originally copied into the digital format.
