On October 9, 2019, a gunman tried to storm a synagogue in Halle, Germany, where dozens were observing Yom Kippur, the holiest day on the Jewish calendar. The attack—which was livestreamed on the Amazon-owned Twitch platform from a camera attached to the shooter’s helmet—was thwarted by a locked, heavy wooden door despite the attacker firing several shots at the door and sticking an explosive on a door jam. The assailant, a German citizen identified as Stephan Balliet, then killed a passerby outside the synagogue and another individual at a nearby kabab shop. A clip from Balliet’s video was included in a neo-Nazi propaganda video uploaded to YouTube on October 13, 2019. The clip consists of 16 seconds of footage taken from the shooter’s video that was uploaded to Twitch (see screenshot comparison below). The YouTube video had 44 views after being online for approximately 15 hours.
Additionally, the YouTube video—approximately one minute and 35 seconds long—included footage taken from two different propaganda videos made by the neo-Nazi Atomwaffen Division (AWD). YouTube has previously removed AWD videos from their platform, but it remains doubtful that these videos have been added to YouTube’s hash database to prevent their reupload. The video’s title referenced James Mason’s book Siege, a neo-Nazi text that encourages the use of violence and terrorism and is revered by AWD and several other extreme right groups. YouTube finally removed the video for violating the platform’s policies on hate speech after it was available on the site for approximately 16 hours.
via counter extremism: Clip from Halle Shooter’s Video Included in Neo-Nazi Propaganda Video on YouTube