subdesu-h how do i go about starting?

[Kotaraeo]

I'm trying to rip videos from subdesuh.
An example link is https://www.subdesu-h.net/koakuma-ka...-animation-02/
I've look into how to use rtmpdump but I can't seem to find the url even with the suggested url grabber programs.
There is also a prompt for you to click before you can start loading the video and that seems to prevent me from using any url grabbers.
Any idea how I should start? completely new to this
Thanks a tons in advance.