This was a lecture given to foreign teachers, in English, by Miriam Lau - former member of the Legislative Council (Hong Kong’s legislative branch of government) and former member of the National People’s Congress.
The context of this lecture is that teachers in Hong Kong must now pass an exam showing sufficient understanding of the National Security Laws and its implementation, in order to apply for new jobs.
Note that Miriam Lau is not a Marxist-Leninist or Communist. She’s a Pro-Beijing Conservative Liberal, and a solicitor (although there were a lot of snarky liberals in the audience that had no idea who she was and just assumed she was a Commie). However, there’s a lot of useful information here for debunking the accusations libs make that the NSL destroys Hong Kong’s freedoms.
One thing I learned from this lecture is that the Court of Final Appeal (HK’s highest court) has the power of final adjudication in HK. You can’t take your case to a higher court after the CFA makes a ruling. It’s like if California didn’t answer to the Supreme Court, had its own “Supreme Court of California” instead, and didn’t have any nationality requirements for its judges apart from the Chief Justice, with most of the judges being foreigners. Compare that to any autonomous territory in any other country.
Part 1 - The Constitution, The Basic Law, and One Country Two Systems