There are many sources on the web of free educational lectures from many different institutions of higher education. One example is the Research Channel. The website has the following description :
"ResearchChannel is a completely unique viewing experience, similar in nature to C-SPAN, but with a very different focus: research. Some of the world’s premier academic and research institutions invite viewers inside the lab to learn about the current, ongoing research that will impact their lives and shape
the future. And unlike other education-based channels, ResearchChannel is broadcast 24 hours-a-day, seven days-a-week, with no commercial nterruptions. In addition to conventional television broadcasts, on-line audiences worldwide have access to ResearchChannel’s continuous webcast and searchable on-demand video library of over 1700 fulllength
programs. These resources are available at Internet2, cable, DSL and modem speeds."
