After looking at some analysis' of it, it could well be a trailer that is completely irrelevant to the game, in terms of game-play; but instead sets the history/theme.
It talks about brain control and the ship (which is BEEPING huge) being under attack and how so many places has also been breeched.
There is also mention about atmosphere. I'm assuming that's related to where the ship would be escaping to; in order to avoid these attacks.
Also on the attack mention; this analysis shows that the attack would be caused by either the Mortiga or Pliigi race. The Mortiga seem to be more of a straight forward smash and bash type of creature, while the Pliigi may use things like "brain control" (i think it's called something similar though).