they used the actual game engine on the highest end PC possible to render the scenes shown. The scenes were highly scripted and choreographed, including custom animations specific to the scenes, so in no way are they indicative of actual gameplay. This trailer was just meant to showcase the look and feel and universe of the game.
With that said, not sure if you played the previous Battlefront games or not but I loved them, and they really were just Battlefield in the Star Wars Universe except they were made by a developer called Pandemic. So DICE developing it is a perfect marriage. Really Battlefield + Star Wars specific combat is what you can expect. Including the vehicles.