More and more universities are moving towards open content. Lectures are now available from some of the major US universities on iTunes.
See from Apple's website below.
iTunes U puts the power of the iTunes Store to work for colleges and universities, so users can easily search, download, and play course content just like they do music, movies, and TV shows.*
Always in session.
iTunes U delivers easy, 24/7 access to educational content from hundreds of top colleges, universities, and educationally focused organizations across the country. And it’s accessible to anyone with a Mac or PC.*
Learning to go.
Students can sync iTunes U content with any iPod or iPhone, so they can go right on learning while they grab a meal, walk to class, or work out at the gym.
Keeps them motivated.
Engaging students on their home turf, iTunes U offers audio and video that make subjects more vivid than any printed page ever could.
iTunes U lets schools open all or part of their content to the public, from parents to alumni to anyone with a love of learning.