A Ted Talk...
is a showcase for speakers presenting great, well-formed ideas in under 10 minutes. This short talk model works, since it only demands the audience's attention for a short period of time, decreasing the chance of minds wandering or daydreaming about lunch. In fact, some of the greatest TED Talks have been as short as 5 minutes long!
TED and TEDx explained
How to prepare a Ted Talk
Sample Ted Talk