This video is a bit long (just over an hour) but well worth it if you are new to Scrum. Jeff Sutherland is the Co-Creator of Scrum and talks about why it’s so important to properly implement Scrum to achieve success with your projects. It’s a great insight into how Google implemented Scrum for their Ad Words project.
http://www.infoq.com/presentations/Agile-Management-Google-Jeff-Sutherland