What to do when every method to download a video has failed?

I'm trying to download a video from the erotic website moresisek, but nothing is working. When I just right click "download the video", the download stops at some point. I have tried the usual capture websites, none of them seem to support that website. I also tried Youtube-dl and Video DownloadHelper, to no avail.

The other videos on that website seem to have similar issues. Sometimes the whole website seems to go down. It's a strange one, to say the least. Do you have any idea how I could get this video?