YouTube says its machine-learning algorithms help take down 70 percent of violent extremist content within eight hours of upload.
The company is recruiting thousands of reviewers to reduce the amount of "problematic content" on its video platform.
Susan Wojcicki, CEO of YouTube, made the announcement while laying out its plans to stop "abuse of our platform" - saying it will be looking to apply lessons it has learned from tackling violent extremist content to other areas of concern.More news: Apple agrees to pay Ireland €13bn in back taxes after European Union challenge
Machine learning is key to this process, however, and YouTube has already harnessed it to great effect in flagging violent extremist content - as well as comparable comments - for human review.
YouTube faced heightened scrutiny last month in the wake of reports that it was allowing violent content to slip past the YouTube Kids filter, which is supposed to block any content that is not appropriate to young users.More news: Cineworld announce deal to buy Regal Entertainment, shares fall
Several advertisers have reportedly pulled ads from YouTube in the past few weeks as a result of stories about videos showing harm to children, hate speech and other topics they don't want their ads next to. There was also a conspiracy-theory video that came up in a YouTube search a day after the October Las Vegas shooting that killed dozens.
NEW YORK (AP) - YouTube is hiring more people to help curb videos that violate its policies. It's unclear, however, how the expansion of moderators announced on Monday might impact this kind of content, since YouTube said it was focused on hate speech and child safety. Wojcicki claimed that advances in the technology allowed the site to take down almost 70% of violent extremist content within eight hours of it being uploaded.
The Alphabet-owned company have taken this step after advocacy groups, advertisers, and regulators have raised concerns about the company's policies to block inappropriate videos and comments.More news: Target Lets You Pay With New 'Wallet' Mobile Payment System
Last month, the BBC and The Times found paedophiles were posting indecent comments on videos of youngsters, evading discovery through flaws in YouTube's reporting system.