This Barbara Walters: 25 on 20/20 is a great video. I actually use it as a supplemental material in my high school journalism class. There are many clips shown of Walters interviewing and it helps students to see how a professional journalist works. She also periodically discusses her interviews and it helps students understand why she asked a certain question, or why she thought that a certain question needed to be asked. It is also entertaining to look at important stories that have been covered over the last 25 years.