Less than 20 minutes after Lyudmirsky recorded the video, Bryant’s helicopter crashed into a hillside in Calabasas, killing the N.B.A. legend, his daughter and seven other people. “The helicopter was circling really, really low, like you could throw something at it,” Lyudmirsky said in an interview. “Before I started filming, it was even lower — it was really close, and that’s unusual.”