What is a "system"?

Question

Video

Hello, please tell me how to find out what kind of system that does not allow downloading from the site? Videos are not of interest, but the download system is.
Video link https://armfilm.org/serialy/10610-ayrvac-anurjner-...
The video is on armdb.org, has anyone come across it? Why can't download? Tried through programs for downloading streams, but does not work.

Answer 1

In fact, there is no specific protection there.
And you can’t download most likely due to some problems either on your side or on the side of the caching nginx.