Spurs442, it depends whether or not you use the graphics card to import your video. If you have a mini-DV camera then you can capture the video using a firewire interface, and so it doesn't matter what graphics card you have (although you'd need to check the laptop has a firewire input as this is not usually standard). Similarly if you have one of the newer hard disk camcorders, then you simply copy the video files straight onto the hard drive without going near the graphics card. It's only if you are using your graphics card to capture the analogue video signal that the quality of the graphics card becomes relevant.
The quality of the edited output will not be affected by the graphics card, assuming you are using some kind of video editing package like Nero / uLead and then burning to DVD, although perhaps the performance of these tools in the video editing process may be affected by quality of the graphics card.