That perspective has threaded through the trials of Chinese lawyers and rights advocates convicted and sentenced on subversion charges this year. It was echoed in a meeting this month about strengthening ideological controls in Chinese universities. A law governing foreign nongovernment organizations that takes effect on Jan. 1 was also partly motivated by fears of foreign subversion.

“The first option for hostile forces infiltrating us is our education system,” the Chinese minister of education, Chen Baosheng, said in remarks published this month. “To wreck your future, first of all they wreck your schools.”

China has been exposed to the world through trade, travel and the internet, and its citizens are in many ways increasingly sophisticated. Even so, party propaganda remains deeply bound to the view that China faces not just disparate critics and foes, but a closely meshed conspiracy that unites those forces. The video is an especially feverish dose of that worldview.

It says plotters and subversives are “stirring up mass incidents and using social tensions as a point to break through and serve as the fuse for ‘color revolution.’ ” They are, the video says, “using foreign nongovernmental organizations to nurture ‘proxies’ and to establish a social basis for ‘color revolution.’ ”

Hong Kong, in particular, is depicted as a bridgehead for Western subversion in China. The pro-democracy law professor Benny Tai, the media entrepreneur Jimmy Lai, the student leader Joshua Wong and others are lined up as among those “making Hong Kong into a base for ‘color revolution.’ ”

The video also refers briefly to booksellers from Hong Kong who were abducted and taken to mainland China last year, prompting an outcry in Hong Kong, which is supposed to have substantial legal autonomy as a self-administered Chinese territory. The video says the booksellers, who specialized in lurid and wildly imaginative accounts of China’s political elite, had “traduced the images” of party leaders.