Thanks to a new NFL policy, something will soon be in short supply on news-media Web sites: video of almost anything related to the NFL or its players. In a move designed to protect the Internet operations of its 32 teams, the pro football league has told news organizations that it will no longer permit them to carry unlimited online video clips of players, coaches or other officials, including video that the news organizations gather themselves on a team's premises. News organizations can post no more than 45 seconds per day of video shot at a team's facilities, including news conferences, interviews and practice-field reports. The policy, announced last month with little fanfare, has frustrated journalists, who say it constricts the public's access to information about the nation's most popular spectator sport. A coalition of news organizations has been quietly lobbying the league for months to change the rule.