For now, the only way Californians can watch the trial over the constitutionality of the state's ban on same-sex marriage is to take a trip to the federal courthouse on Golden Gate Avenue in San Francisco.

Just an hour before the trial got under way Monday, the U.S. Supreme Court halted for at least two days the judge's plans to allow video of the proceedings to be uploaded on a delayed basis on YouTube.

The 8-1 decision also prevented live simulcasts from being broadcast at the federal appeals court building at Seventh and Mission streets and at courthouses in Seattle, Pasadena, Portland, Ore., and Brooklyn, N.Y.

The court said it wanted until at least Wednesday to consider arguments by backers of Proposition 8, the November 2008 ballot measure outlawing same-sex marriage, that camera coverage could result in threats or even violence against witnesses favoring the measure.