These are the Later Lectures of Ralph Waldo Emerson. The material comes from various sources and covers a variety of topics. Most of these lectures were given after 1850. The important ones center on the issue of slavery and Emerson's course at Harvard on the History of the Intellect.
Emerson: The Ideal in America—Educator’s Edition
Documentary on Life and Inspiration of Ralph Waldo Emerson
Educator’s Edition, includes full interviews, 54 minute doc + 49 minutes of bonus material.