This is pretty interesting, not to mention damning, if true:
The day after this video went public, I (and millions of my closest friends) received an email from Jim Messina at Obama Campaign HQ, directing me to a blog post defending the President.
I invite you to look it over, bearing in mind a dog not barking. You will note that the blog post contains no actual defense. Rather, it is nothing but ad hominem attacks on OPSEC and the various people involved in making this video.
It's possible, of course, that the video is a lie. But the Administration would mount a more credible defense by explaining that, rather than just telling us we can't trust the video producers.