According to CNN Business, "Facebook, YouTube, and Twitter struggle to deal with New Zealand shooting video."
"Deal with" is code for "censor on demand by governments and activist organizations who oppose public-access to information that hasn't first been thoroughly vetted for conformity to their preferred narrative."
Do you really need to see first-person video-footage of an attacker murdering 49 worshipers at two mosques in Christchurch, New Zealand?