TED

I haven't time to watch all of these videos but they could be marginally interesting (except 10 which is marginally humorous). They're from the TED Conference which is held every year in Monterey. Most, quite possibly all, the talks from the conferences are available on YouTube. Once you consider that nature of the conference and it's location, it makes sense that the speakers are generally center-left/progressive/whatever-you-want-to-call-it.