So this is the video from the long waited Post Credits Scene in The Avengers film.
Tony Stark, Bruce Banner, Black Widow, Thor, Captain America and Hawkeye are sharing a friendly moment in a Shawarma Restaurant (a little but destroyed) two blocks from the last battle, as Tony previously mentioned it during the film (after Hulk screamed at him).
No dialogue, just a special moment of pure camaraderie.
Option 2 to watch the Post Credit:
We previously posted a screenshot, and now this video confirms that this is the legit after credits scene (after the Middle Credits one with Thanos)
Option 3: This happens in the previous scene where Tony invites everybody to eat Shawarma:
http://www.youtube.com/watch?v=nfXtOK7eGCQ