Download and install the trialversion of Nero7. Open NeroVision, then make DVD. Choose add video files (add the file that you want to be burned as a DVD)

then press next next next then make sure that the right drive(device) is chosen, which you of course put an empty compatible DVD-R or DVD+R disk into (I recommend Verbatim disks). Whether to choose + or - depends mostly on your DVD burner and your DVD player

Then press burn

That should be it unless you run into complications