I'd like to cite http://www.ted.com/pages/about (AKA Ted TV). This was not "authored" per se."
What method of citation are you using? MLA? APA?
Either way I would cite this as a lecture.
In APA it would look like this:
Cain, Susan (2012). TED:The Power of Introverts [video]. Retrieved from http://www.ted.com/talks/susan_cain_the_power_of_introverts.html
Cain, Susan. "The Power of Introverts." TED. Feb. 2012. Lecture.