Not according to salon he didn't:
Word of the footage reached Salon through a source unaffiliated with Moore, or his film, "Fahrenheit 9/11,"
Granted, salon's not exactly the most trustworthy source.
My overall point stands. The tape contains nothing that incriminates Moore, and most likely nothing that is at all germane to the investigation of Berg's death. Moore has deliberately leaked to the media his possession of the tape because he's engaged in some sort of publicity stunt. Most likely he hopes to bait the FBI into "harassing" him so he can then play the victim and point to the Patriot Act as the malevolent instrument of Der Fuhrer George W. Bush and his henchman John Ashcroft.