What's odd about this is that lawyers never ask questions they don't already know the answer to. This video is just one short snip of Dershowitz's talk at Brandeis...h/t to The David Project:

I haven't seen any complete video of both talks yet. The Boston Globe has three pieces that mention the event, here, here and here. All are fairly fawning and are more about the process than any substance on the part of Carter (or Dershowitz). Looks like video of Carter's talk itself is at that first Globe link, but I'm holding out for the whole thing.