Behind the Magic: The Visual Effects of The Avengers
ILM have put together an awesome behind the scenes featurette for The Avengers.
Avengers: Age of Ultron - Behind the Scenes Videos
Marvel go behind the scenes on Avengers: Age of Ultron with these three featurettes.
Captain America: The Winter Soldier - Clips
Marvel have released six minutes worth of clips from the upcoming Captain America: The Winter Soldier film.