Although not 100% correct, if a reasonably accurate thing to say that 'Only in America' do they allow cameras such unfettered access to court cases. I think that had a massive effect on the way the OJ case was tried, and the verdict was affected accordingly.
Slim, it is up to each Judge whether to allow cameras, video or still, into a courtroom during a trial. Since the disastrous OJ murder trial a poll of sitting judges in the United States showed that over 90% of all judges taking the poll would now refuse any cameras of any type into their courtroom. Of course with the size of cameras today someone could sneak a video camera into a courtroom. However, in doing so they would risk a contempt of court charge and would most likely have to pay a stiff fine and in addition serve a jail sentence. Very, very few trials now days does a judge allow live coverage for TV. However, nearly all trials are now videotaped by the court, sometimes that video is released after
the trial is concluded.
On your last sentence you are right on, it turned the trial into a media circus.