The lectures require the RealVideo Player, which is available free for Windows, unix and Mac platforms.
The player is available at the link above or at Real Video's web site.
This lecture is "The Connections Between Quarks and the Cosmos" presented by Micheal Turner on September 17, 2001.
You can select the segment of the lecture and how the lecture is displayed from the options below.
The starting slide
These lectures have been created to show the Physics for Everyone Lecture Series to the widest audience in the Web.
The presenter's materials can be found here PDF.
It supports a frame-style view or a separate player and browser window.