Dozens of copies of what appears to be footage from a helmet-mounted camera are circulating on the darker corners of the internet and are being persistently posted on more mainstream platforms such as YouTube, Twitter and Facebook, which don't always manage to catch the video before it goes up. Horrific videos like the one posted by the Christchurch mosque shooting suspect Brenton Tarrant are geared to appeal to the morbidly curious, and appeal it did.
