Columbia University has posted videos of the talks held there in honor of NL@50. There are also PDFs of the talks by Oliver Harris and Brian Schottlaender.
See here for the complete list of materials:
http://academiccommons.columbia.edu/sea ... .member_of
To view the videos, you open an individual entry and look at the "File" link toward the bottom. If you see an mp4, that's a video. You'll probably have to download it to play it.
Alternatively, here are the direct links to the videos:
http://academiccommons.columbia.edu/ass ... ssion1.mp4
http://academiccommons.columbia.edu/ass ... ssion2.mp4
http://academiccommons.columbia.edu/ass ... ssion3.mp4
Oliver Harris' keynote lecture was also published here on RealityStudio:
http://realitystudio.org/scholarship/fr ... ked-lunch/
Big thanks to Columbia for finally getting these videos online.