In the wake of this latest tragedy, which left 17 people dead at the school in Parkland, YouTube still seemed caught by surprise by the rise of another video meant to peddle a baseless theory.

“In 2017, we started rolling out changes to better surface authoritative news sources in search results, particularly around breaking news events,” YouTube, which is owned by Google, said in a statement. “We’ve seen improvements, but in some circumstances these changes are not working quickly enough. In addition, last year we updated the application of our harassment policy to include hoax videos that target the victims of these tragedies.”

Unlike the other unhinged clips that have garnered significant attention on YouTube in the recent past, the video of the Parkland survivor originated with neither a conspiracy-oriented media organization like Infowars nor one of the popular YouTubers who have catered to far-right subcultures and fringe political factions.