China has historically not needed Western social media as much because Beijing exerts tight control over the internet through a system of filters known as the Great Firewall. But people in Hong Kong, a former British colony that has a different governance system than the rest of China, widely use Facebook and Twitter and other Western social media apps.
In its blog post on Thursday, YouTube did not address why it disclosed the disinformation channels days after Facebook and Twitter had revealed their findings. Unlike Twitter and Facebook, the company also did not include examples of the content it removed.
YouTube and Huntley did not respond to requests for comment.
"This aspect of the information operation is much like the Twitter or Facebook content, part of a larger whole that goes across platforms," said Graham Brookie, the director of the Atlantic Council's Digital Forensic Research Lab. "Each one of those parts is extremely important in terms of understanding the larger network." He added that YouTube rarely released data about content it removes to researchers, and that the company may fear amplifying false content by publishing it.
According to a database of the Twitter accounts that posted disinformation about the Hong Kong demonstrations, which was provided by Twitter earlier this week, some of the accounts routinely posted links to YouTube videos. Brookie said his team found thousands of YouTube videos in the database.
Some of the content appeared benign — including cooking tutorials — and remains live on YouTube. But many of the YouTube videos shared on Twitter had been removed and replaced with messages stating that the YouTube accounts had been terminated. It was unclear if the accounts had been removed by YouTube or by their operators.
Archives of the removed videos, hosted by the digital library The Internet Archive, showed that some of them focused on Chinese political issues beyond the huge protests in Hong Kong. Several removed videos featured the exiled Chinese billionaire Guo Wengui, who has used social media to accuse leaders of the Chinese Communist Party of corruption. The videos said Guo was a fraud.
YouTube said it would continue to allow media outlets backed by the Chinese government to post and advertise on its platform. Twitter had said on Monday that it would ban state-backed media from posting ads on its service.
YouTube inconsistently identifies content that has been sponsored by a government, using a warning label format that it has also deployed to guide viewers away from violent or anti-Semitic content.
One YouTube video of a comedy routine posted Shanghai Media Group, and tweeted by an account Twitter linked to the Chinese disinformation campaign, came with the label: "SMG is funded in whole or in part by the Chinese government." But another video from China Central Television that was tweeted by accounts linked to the disinformation campaign carried no such label.
Even though the major Western social platforms are blocked within China, Chinese state news outlets have spent hundreds of thousands of dollars to build their presence on YouTube, Facebook, Twitter and other sites, government procurement records indicate.
Written by: Kate Conger
Photographs by: Lam Yik Fei
© 2019 THE NEW YORK TIMES