How to Edit a Documentary Film

"I find that editing is just all problem solving, just constantly problem solving and can I put some B roll here? Can I put a little music?" he says. "The mood determines the color, the value structure of what you're going to have to put on it,. And that's what music does too." He adds: "You know how much contrast there is in the musical score so like the piece has to actually tone down the most important part of the time"