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The nearest thing streaming video has to a search engine is Timecast at http://www.timecast.com. Type in a very general topic such as “science” and Timecast will offer a list of relevant sites from its 4000 streaming links. One of its science links is to Cyberclinic at http://www.avglobal.com/cyberclinic, a health site offering videos on a range of topics. More on these topics: