TED contains 18-minute videos by experts from around the world. As the site puts it, you can find “Riveting talks by remarkable people, free to the world.” For those who are curious, TED stands for Technology, Entertainment, Design.
One of my favorite TED Talks (that’s what they’re called) is by Sir Ken Robinson — it’s called Do Schools Kill Creativity? (in case that link does not work, the talk is also on YouTube, with well over a million views)
One of the coolest features of TED is that there’s an interactive transcript for most talks.
I find that for most talks, I can listen to the first few minutes to get the speaker’s delivery style, and then I can read the rest of the talk to determine whether it seems like it’s worth watching the rest. Sir Ken is worth listening to — his delivery is spectacular, particularly his pauses which occur at just the right places to let the listener process.