Paul Solman made a series of videos for introductory economics students. As Solman mentioned in one of his blog posts, those videos were packaged together with several introductory economics textbooks. The complete set of videos, including the video on the Oprah Supply Curve, can be found through the link on Solman's blog post. The video on the Oprah Supply Curve has also been posted to YouTube. That YouTube video is embedded below and also available here. A transcript of the video is available here.