This series has it All, Ancient Evil, Parasites, Blood harvesting, Nazis, the disease, War, Famine and extermination of the Human race. It is worth watching for anyone who can stomach it.

I could type a long winded tangent on what the Vril is and what it's also purported to also be but I'll spare you. I found an Archive link to a book that does a fairly good job at explaining the Vrils secret society, it's connection to the Thule Society and the Nazi party. The Nazis at their root were Occultists and many of the top echelon belonged to these occult societies before launching their version of the beast kingdom that sought to subjugate the world, much like the first iteration of a one world totalitarian government, Nimrods Babylon. Here is a link to the book I mentioned above it is free in Archive and does include a description of the contents if you're short on time or interest.

https://archive.org/details/castle-werfenstein-and-the-wonder-women-of-vril-maria-orsic-and-the-beings-of-li

Furthermore, some of the more "Sci-fi" type of explanation of these "Vril" is a parasite that is passed from one person to the next that enters into the human body through the ocular cavity and attachs inself to the brain steam to gain control of said person. It is depicted in "The Stain" and maybe this NetFlix series although I have not seen it. This has formed an explanation of the "Black eye club" many of the elites seem to enter and also the "one eye" symbolism predominant in the Occult. Hope this is a start for you and thank you reading.