I hope you were not hoping to see gameplay from Battlefield 1's gameplay trailer, because if you were you will be sadly let down. During the EA Play conference EA Games came onto the stage to show off a gameplay trailer for Battlefield 1, and honestly what was shown was very little gameplay and more in-engine cinematics. It is still worth watching, but if you were hoping to learn more about how this game will play compared to other Battlefield games then you will be let down.
Still, you can watch the new trailer below, just don't have high hopes. But on a positive side they don't just reuse the same old footage so that is good: