If you saw this on your computer display, it could just be a problem with your DVD player software. The video on the DVD is interlaced video, while your computer display is progressive scan.
Otherwise, you have a field order problem, i.e. you're playing the wrong field of the interlaced video first. If you see this on video you export from your video editing program, then you've captured the video with the wrong field order. If it was okay, then you have the wrong field setting in your DVD authoring package.