Google’s new baby, Google Video, lets American searchers search the content of television channels such as PBS, the NBA, Fox News, and C-SPAN, among others. The reason you are able to search the actual content of the programs, and not only a program presentation, is the existence of embedded text content, so-called closed captioning (subtitles for the hearing impaired etc).
Here are some of the features of this service:
+Preview page: Displays up to five still video images and five short text segments from each program.
+Upcoming episodes: Shows when the program will be aired next.
+Search within the show: Enables searching for specific words within a given program.
+Program details: Offers program and episode information including channel, date and time.
+Change location: Finds the next time and channel where a program will air locally according to zip code.