We will need a narrator to narrate this battle either on 'Normal' speed or 'Slow' speed on the replay viewer. We will only need the audio file. You may record video with audio if you're comfortable doing that, as the editor will split audio from video.
We will also need an editor that can record the battle in high quality and edit it. An example of how it should be edited: http://www.youtube.com/watch?v=3_YiU_a3Y84