When a movie has done well, an extended or super trailer is sometimes released. If you don't have 2 hours (or 12 if its the Lord of the Rings) to watch the entire movie, then the super trailer is your ticket. It is a highly condensed version of the film with all the best parts and lines. I've posted three: The Lion The Witch & The Wardrobe, Elizabeth The Golden Age, and The Lord of the Rings.
The Narnia uber-trailer really is a doozy as it comes in at a length of 9 minutes. Its nearly twice as long and the other two I've posted. This trailer really gives away just about every bit of the movie. So if you feel like watching both Narnia movies in one night but don't have the time, then just watch this first and then pop in Prince Caspian. Most of the music is taken from movie's soundtrack. The beautifully powerful music from about 5:42 until 8:30 is a mix of pieces from the main theme of Children of Dune, composed by Brian Tyler.
Elizabeth is a well made extended trailer and includes an great scene towards the end of Cate Blanchett as Queen Elizabeth telling off the Spanish ambassadors. The music that starts up at the 4 minute mark is "My Name Is Lincoln", composed by Steve Jablonsky, from the movie The Island. Steve Jablonsky also wrote the music for the Transformer movies.
The Lord of the Rings super trailer is my favorite of the three. This super trailer really is a time saver! It takes you through each individual movie, condensing 12 hours of movies into almost 7 minutes. Each segment is well edited, accompanied with that movie's music, with great transitions between the movies. The trailer helps put the three movies into perspective with how J.R.R. Tolkien saw the books as one entire story (He wanted it published as one book). At the end of the trailer, it has a great sequence of all the key characters accompanied by a beautiful piece of music titled "In Dreams" performed by Edward Ross, that is found on the Fellowship Of The Ring: The Complete Recordings soundtrack.
Enjoy the 20 minutes of trailers!