That "IEEE1394" is a firewire port, which you can use to connect your DV camcorder to stream off digital video.
The inputs and outputs on your video card allow you to output (TV-out) a signal to your TV (or some other display device), as well as accept (in!) signals from a VCR etc, although I think this would be limited to an analogue format (not as good as digital).
Were you supplied with any cables and appropriate software?