YOUTUBE allows extremists to spread jihadist propaganda online by exploiting holes in the website's filters, it emerged today. The site has a two-hour target for taking down terror content - but it misses that target in a quarter of all cases, a report reveals. Extremist videos end up getting more than 12,000 views a week, allowing the jihadist message to spread across the world. Among the clips which have been freely uploaded to YouTube is a bomb-making video used by the Manchester Arena attacker. The Counter Extremism Project monitored YouTube for three months to see how much extremist content slips through the net. Ex-minister Mark Simmonds told the Daily Mail: "This study dispels any lingering myth that YouTube are doing enough to stop their site being used as an IS recruitment tool. "The research shows that YouTube are not even meeting their own promise to delete all extremist content within two hours."