This is a trailer-style compilation video illustrating Darth Sidious's brilliant rise to power and the seduction of Anakin Skywalker to the dark side. Clips are from all six movies but mostly Episode's I-III, there are also some pictures from the Expanded Universe in there.

Hope you enjoy :)
(I recommend headphones when watching this video)

UPDATE: The Expanded Universe images in this video are no longer officially canon since the Disney takeover :(. However, in my little world I still consider most of the EU or "Legends" content that happens before Episode VI as "pretty much valid." Also, if Episode VIII reveals that Snoke is indeed Darth Plagueis, I might have to change the title of this video!