The full clip of the Reason.tv interview, where filming continued after Matt's comment to the cameraman, is at YouTube and is worth watching - the reporter claims she is as informed as Matt's professor mother. The photo below is from the Washington Post.
Other good videos discussing Matt's comments are at MSNBC and Anderson Cooper 360. A new video with Matt criticising current education policies is available here. Matt's mother wrote to the Boston Globe criticising the paper's superficial coverage of the rally.
Matt has a small role in Margaret, which will finally receive a limited release on 30 September 2011. More details are at the LA Times.