https://techcrunch.com/2019/03/18/facebook-says-the-original-new-zealand-shooter-video-was-viewed-about-4000-times-before-removal/

Facebook released new figures about its attempts to stop the spread of videos after a shooter livestreamed his attacks on two Christchurch, New Zealand mosques last Friday, killing 50 people.

In a blog post, Facebook vice president and deputy general counsel Chris Sonderby said that the video was viewed less than 200 times during the live broadcast, during which no users reported the video. Including views during the live broadcast, the video was viewed about 4,000 times before it was removed from Facebook. It was first reported 29 minutes after it started streaming, or 12 minutes after it had ended. Sonderby said a link to a copy was posted onto 8chan, the message board that played a major role in the the video’s propogation online, before Facebook was alerted to it.