TRADE, FIGHT, BUILD, THINK
These are the four keywords which stand for the freedom to do what you want inside the X Universe. So there will also be four trailer videos talking about the game features, one for each topic.
BUILD was already released a few weeks ago, and today we added THINK.
Here are the (low quality) Youtube versions, but to seriously watch them, please download the high quality XVID versions from egosoft.com under DOWNLOADS (also available are German localised versions!).
Think Trailer: English version
Build Trailer: English version