| September 17, 2013 Three years ago, YouTube started putting live video in banner ads. Since then, the practice has become more common, and today The New York Times joined in with an interactive ad unit on Tuesday that marks the first time the paper has live streamed one of its own conferences in an ad. Visitors to the Times homepage were presented with a live stream of its “Schools for Tomorrow” conference, about the rise of the open online courses at colleges and universities, sponsored by Bank of America. The new ad is reflective of a broader tendency at the paper towards r...