Your digital camcorder will almost certainly come with a firewire out to allow you to connect it to a computer at a later date should you wish to do your own video editing. When a DigiCamcorder is connected in this way you are able to control the transport controls (play, rewind etc.) from the computer. Some of them also come with a firewire in as well, the advantage of this is that after you have editied you video on the computer you can record it back to DV tape with no loss of quality.