Another huge point: make the music fit what the viewer is seeing and what you are saying. The MTWII music is great, but it reaches crescendos at, perhaps, not the best times, making it a bit overly dramatic for a brief bombardment of facts. The narrations could use a fair bit of tidying up, both by adjusting the start and stop times, as well as creating a constant volume and tone in each audio clip.
Still a good documentary, overall.
