I dunno where to find that, but what I do know, or at least guess, is that the ship you speak of is a Protoss command ship. Carriers gotta come from somewhere, you know? The Protoss command ships essentially transport the fleets from place to place and burn out the Zerg-infested planets. What the intro video is is actually the "cleansing" of Chau Sara, Zerg-overrun sister world to Mar Sara. It was Humanity's first meeting of the Protoss, and the only humans who lived to remember it were the Confederacy of Man. The Protoss world-ships are the ones who warp through space from planet to planet, getting rid of those with uncontrollable amounts of Zerg infestation. Read the first Starcraft novel, Liberty's Crusade. It follows the first Terran campaign from the view of a Tarsonis reporter, assigned to the Norad II for a military news segment. It follows the campaign VERY closely. A lot of the main character interactions are recognizable from the game.