It is quite insightful to listen to them both talking about music and lyrics, the inevitable violence in this world, and the honesty of Christian music. It's worth a watch, and what a lovely to live in where Eugene Peterson's home is. What a spectacular view. It's also quite amusing how Mrs Peterson was chiding Bono at the end of the video as he was leaving.
It is also featured in this article in Huffington Post: Bono Wants Christian Music To Get More Honest.