In Soviet times, the class was called "preliminary military training", and focused more on that aspect - not quite to the point where they'd shoot things, but it would involve timed field-stripping an AK, for example, and reading military topographic maps.
After 1991, the military aspects were stripped out, although in many schools they turned into an opt-in afterschool "patriot club" or some such. These were the primary source of videos like https://www.youtube.com/watch?v=LrxjYfl05ek.
Recently, they've announced that they'll be reviving the old Soviet format, so it'll become mandatory for all high schoolers again, beginning with the next school year (starting in September, 2023).
