Search engine that catalogs the transcripts from online video lectures and presentations. When viewing a result you can skip to the section of the video that contains your search query.
"My goal in this article is to help you understand the available Evernote search tools, so that you will find it even easier and more enjoyable to use, than it already is. And if you're not a current Evernote user, to encourage you to take a look (or another look) at it. Note that these methods can be used in both desktop and web versions."
A search engine that allows you to enter your query, then select a credible source to search for that term in. These include JStor, the Library of Congress, Ebscohost, Eric, the Internet Archive, and many more.