Cincinnati police today released a police videotape to support their version of a confrontation in which a man died and an angry crowd gathered afterward. Police said they pulled over 19-year-old Antwand Yett of Cincinnati for a traffic stop, and that Yett shot himself to death as officers approached his sport utility vehicle last night. Police said false rumors spread that officers had shot him, and someone fired shots at the officers. Police said they did not return fire. The officers escaped harm in the confrontation. During the tension, someone set fire to a television news truck and someone threw a rock through the windshield of another station's news vehicle. There were no arrests.