I am a coach, and trying to make a highlight video of all my teams footage throughout the season. the problem is they are all on DVD and there is about 15 of them I only have 20gb of space on my harddrve. I have ripped two dvds but kept only a total of 3min from both dvds the problem is that 3 min of clips have taken 18gb of space. I am quite confused and have never done this before can I have a hand please