China once again blocks YouTube

As recently reported by Google, YouTube’s traffic rate in China has dropped sharply. And ultimately, access to YouTube in China has been completely blocked until now. Commenting on the news, the spokesman for the Chinese Foreign Ministry, Qin Gang, said that “the government is not afraid of the Internet, and he is hearing about outages for the first time.” However, he also noted that: “The Internet needs government regulation to prevent the spread of information that could damage national security ". Is it a security threat to the Chinese government that served as a video clip with people in the form of Chinese policemen who were beating Tibetan monks and parishioners? And what can serve to close sites in the Russian Federation if the Russian firewall does pass through the law.
UPD. One of these videos