An exclusive from Chris Geidner at Buzzfeed:

NBC News blocked backers of a key marriage equality measure in Washington State from using a video featuring Chelsea Clinton urging voters to support a state-wide referendum on gay marriage, BuzzFeed has learned.

Clinton, a vocal proponent of marriage equality, cut the video for a group supporting the Washington state measure, as well as a second video for another group. But NBC, for which Clinton works as a “˜special correspondent’ since last November, “˜scuttled’ the campaign, sources familiar with the ads said. …

Three people who saw the videos confirmed their existence to BuzzFeed. They were fully prepared, with the script approved in advance, one source said. The video wasn’t intended for TV broadcast, a second source said, suggesting they were instead to be used as web-based videos., a group which successfully worked with others to pass marriage equality laws in Washington, Maryland and Maine, and to defeat a Minnesota effort to ban same-sex couples from marrying by way of a constitutional amendment, was apparently to be one beneficiary of the Clinton video.

In the video, a third source said that Clinton described her belief that everyone should have the freedom to marry, detailed the importance of the upcoming votes, and stated that success in the states voting on marriage would send a message to rest of the country.

Geidner reports that Buzzfeed inquiries to NBC and to a “Clinton spokesperson” had not received responses at the time the article was posted. He also indicated that The New York Post had earlier reported that it was Clinton’s contract with NBC News which kept the video she made from being used.

(Chelsea Clinton photo via Chelsea Clinton FB)