UPDATE #2 - Looks like the video is official! It was posted on the Battlefield YouTube page. The only difference is that the video does not mention the five minute multiplayer demo.
A new video has reportedly been leaked and looks to be the first official trailer for Battlefield Hardline. The trailer indicates that a full five-minute video of the multiplayer demo will be available on the game’s official website sometime in the near future. The trailer also announces the October 21st release date for the game.
The 50-second video is full of explosive action definitely plays up to the cops-and-robbers theme. No word on whether or not EA and/or Visceral confirms or deny the video.