Honest Trailers: Game of Thrones
If you don't know the "Honest Trailers" videos, you should!
This one is for Game of Thrones, and it's very fun =)
They have a lot of these, for all kinds of movies, tv series and videogames.
Warning: lots of spoilers from season 1, 2 and 3. There is a non-spoiler version, too.