https://www.cnet.com/news/facebook-new-zealand-shooting-video-had-fewer-than-200-real-time-viewers/

As previously noted, Facebook purged 1.5 million uploads of the video and most (1.2 million) were blocked before going live on the platform. Sonderby said in the Tuesday blog post that the original video was digitally mapped so that Facebook software could detect and block similar videos.

On Friday, a gunman in Christchurch attacked Muslims praying at two mosques and livestreamed the shooting on Facebook. The death toll from the incident stands at 50, according to CBS News.