To access the full iTunes conference, go to itunes.columbia.edu, then select "Public Access", which will launch the iTunes application (or prompt for free download of software.)  To locate conference video files, scroll down right panel to "Centers and Departments," select "Columbia University Libraries," and then select "Tibetan Studies."  Or for ease, you may use this:

Direct link to conference presentations in iTunes

Links to individual sessions are available below. For these, each track is about 200MB, so total download time may near 5 minutes depending on connection speed.

Please also see Related Resources below for useful bibliographies distributed at the conference.