A colleague of mine, Steve Audette has posted some useful videos about the art and theory of documentary editing. Steve is a lead editor for WGBH public television and a very talented editor. Be sure to check some of these options out.
Here's one on After Effects:
Here are three more:
"Thoughts on Documentary Editing part one"
"Thoughts on Documentary Editing part two"
An Overview of After Effects for Documentary Editors
Avid ScriptSync for Documentary Editors