Here is an awesome video that over thirteen minutes long! It is SPOILERS galore, but it is still worth it to watch. Nearly every actor who has a major role speaks a bit. It gives great insights into the plot and story line. They used the appendices of The Lord of the Rings to add a bunch of history, especially concerning the dwarves. Unfortunately, you have to be a tried and true Tolkien fan to enjoy all that, so The Hobbit: An Unexpected Journey has already received a lot of flack. Enjoy!