Suffering from information overload?

Social media services, such as YouTube, Flickr and Creative Commons, contain enormous number of content valuable for education. If the requested theme can be effectively searched or recognized, teacher can easily construct the course material from social media sources. However, the search engines are not optimal for educational purposes: Search engines can list numerous pieces of content that matches more or less perfectly to keywords. After search there are thousands of pieces of content to check manually if they really fit to the requested subject.