Although we talk about the potential for digital information to break down the barriers to the democratization of knowledge, this interview with Salman Khan shows to power of video broadband to increase even further connection to learning. 
In this case the YouTube videos produced by Salman Khan of Khan Academy are personal conversations about complex math concepts that students can view and have the opportunity to develop beyond the classroom pace. Khan has produced more than 1,000 YouTube videos ranging from basic multiplication of fractions to polynomial approximation of functions.
Khan developed these videos to help a niece who was getting placed into a slow paced math class, whereas Khan saw that she could understand more complex concepts than those she failed to absorb to place higher in math. The videos are available to anyone on uTube to learn at their own pace, replay, rewind or fast forward as their personal needs require.
Khan Academy:   http://www.youtube.com/user/khanacademy
Below is  a quote from the interview on “All Tech Considered”.
 
When you're teaching online there is not a real time exchange with the students and their comments to you aren't coming back in real time. Do you think that would be an added virtue of education or does it matter that much?
Mr. KHAN: I think this is an advantage I have over a traditional teacher. Just from my limited experience from teaching live, one of the hardest thing is to sit in front of a classroom of 20 or 30 students and maybe five of them are giving you a nice, attentive expression and the rest of them have blank faces. You don't know if they're bored or falling behind and it makes you insecure and you don't know what to do next. But I go to my computer, spend 10 minutes, explain something as I would explain it to you or my cousin, and then I upload it on YouTube. The whole process takes, you know, maybe half an hour. And within an hour of putting a video a few hundred people will watch it and I wait for them to give that YouTube five-star rating and put a couple of comments up saying oh, this is so great. I was going to fail this class. Now I'm going to pass the exam tomorrow, whatever else