Apparently this whole thing was faked, but it was a pretty good one especially since the video was posted on what was made to look like Sony Pictures' official YouTube page for the film. It has been pulled though.
Total Film tweeted out the following update:
We've spoken to Sony, the Bond 24 teaser is indeed a fake - just as we thought. Expect an official announcement soon.
Here's a surprise! MGM has released a teaser trailer for the 24th James Bond film which has been given the title Come and Dive. The trailer features some moody music and Daniel Craig looking unemotional. The film doesn't even start shooting until fall, and won't hit theaters until late 2015, but producers Michael G. Wilson and Barbara Broccoli apparently wanted to give fans something to spark their excitement. We have some new information on the film as well.
In COME AND DIVE, Bond will be swept away by a dangerous love story. As MI6 rises from its ashes, 007 must protect a mysterious stranger and unveil long forgotten secrets.
COME AND DIVE marks the return of Daniel Craig as Ian Fleming’s James Bond 007, as well as Ralph Fiennes as M. The film also stars Naomie Harris as Miss Moneypenny. The film is directed by Sam Mendes.
All of this stuff definitely has me excited for the movie, and I can't wait to see more!