a social networking site in which BBC offers cultural reviews, with clips, and readers comment or write alternative reviews; readers also submit own reviews
"Time-lapse photography allows us to easily see the movements of plants and clearly demonstrates that plants are living organisms capable of some extraordinary things." various phases of plant life, both on cellular and external level
how-to videos or, more commonly, audio/slideshows; useful rhetorically for both technical writing and instructional video learning; web2.0 sharing of video that is perhaps instructionally more useful than YouTube.