Star Wars: Episode III - Revenge of the Sith (2005) Teaser
“Torn between loyalty to his mentor, Obi-Wan Kenobi, and the seductive powers of the Sith, Anakin Skywalker ultimately turns his back on the Jedi, thus completing his journey to the dark side and his transformation into Darth Vader.”
https://www.youtube.com/watch?v=ndbPa_b98Ho - a 102 second video at the Movie Trailer Locker YouTube channel.
Star Wars Episode III: Revenge of the Sith - Trailer
Years after the onset of the Clone Wars, the noble Jedi Knights lead a massive clone army into a galaxy-wide battle against the Separatists. When the sinister Sith unveil a thousand-year-old plot to rule the galaxy, the Republic crumbles and from its ashes rises the evil Galactic Empire. Jedi hero Anakin Skywalker is seduced by the dark side of the Force to become the Emperor’s new apprentice – Darth Vader. The Jedi are decimated, as Obi-Wan Kenobi and Jedi Master Yoda are forced into hiding. The only hope for the galaxy are Anakin’s own offspring – the twin children born in secrecy who will grow up to become heroes.
https://www.youtube.com/watch?v=5UnjrG_N8hU - a 2m 30s video at the official Star Wars YouTube channel.