
Not sure of the exact name of this class, but I'm thinking Nova or Nebula for some reason.

Obviously Defiant (or Valiant, or Hornet if you consider that canon) class.
I went through the whole sequence in ultra slow motion and all they do is cycle through the same 5 or 6 screens. There's actually a ship I don't recognize (the one Malcolm points out doesn't look like any Klingon cruiser I've ever seen, but it could be intended to be post-24th century). They show these two more than once, they show what appears to be a Cardassian battleship I recognize from the Dominion War. It has the half-disc shaped section.