That depends on several different considerations. The first is: what format is the video in now? If you do not know, check in the manual of your camera to find out its export format. Or look at the file with MediaInfo ( a free video utility program) and tell us what you have.
The second consideration is: where do you want to play this video? If you just want to copy it to a disk and play on the computer, you don't need to convert the video. Just burn as data onto a blank disk using any burning program. Nero, CDBurnerXP or Imgburn should be able to do this nicely.
If you want to play this on a stand alone dvd player, you will probably have to convert to dvd video. There are several different conversion programs that we regularly recommend here, including two free ones, DVDFlick and AVStoDVD. There is also a popular commercial program called ConvertXtoDVD. Since you live in Australia, you'll need to make sure to have the program that you use output in PAL dvd format.