Although I didn't watch, I have seen many of the musical numbers. (All the numbers are online at NBC.com.)
What fascinated me, moved me and entertained me was the "Making Of" documentary. I wanted to share it with you all because I think it will do the same for you.
Here is the link: http://www.nbc.com/sound-of-music/video/the-making-of-the-sound-of-music-live/n43826/