Click the arrow to watch Dr. Logsdon's 2005 lecture on YouTube.
Dr. John Logsdon is the Professor Emeritus of the Space Policy Institute at George Washington University. He is the author of John F. Kennedy and the Race to the Moon, the definitive work on the titular subject.
In the fall of 2005, the Massachusetts Insitute of Technology offered a course on aircraft systems engineering, focusing on the Space Shuttle. The course offered a series of lectures that were videotaped, all of which are online.
Above is Dr. Logsdon's lecture on the decision to build the Space Shuttle. It's a fascinating insight to the political compromises that led to the program we've known for the last thirty years. The video runs a bit short of two hours.