[Update: EA has actually gone ahead and uploaded the official trailer to their channel. Only difference is that it's lacking the platform details.]
Quick, before Electronic Arts removes the video. If you do miss out, know it's about 50 seconds of quickcut Hardline footage. The video ends stating we can expect a five minute video of Hardline's multiplayer on the official website, presumably during E3.
The leak comes by way of SkyEagleGaming, and along with some screenshots we also now know that Hardline is coming out on October 21, and that this will be coming out for both current-gen and last-gen platforms, as indicated by the PS4 and PS3 endslate on this leaked trailer.