It was this one I think (started out about iPods, became about texting):
Thanks for including a link to a captioned version, boomer! Been a zoomy week, hope to get to it soon though.
Without having seen it, I doubt that conversation will become a lost art. People have too much of a primal need for connection -- we're very social creatures. I think that smart phones have a negative impact on waiting sorts of situations -- lines, waiting rooms, etc. But not to the extent that real, in-person conversation will actually disappear. There are still many non-waiting sorts of situations where people converse. (School, work, parties, dates, family dinners, etc., etc.)
Also the two (text-based communication, in-person communication) have often connected for me. I'll see something on Facebook, and then when I see that person face-to-face I'll use that as a conversation starter. I regularly text a good friend in another state, who just came for a short visit and we talked for about six hours straight as comfortably as if we'd last seen each other the day before (it had actually been about six months).