They are geoblocked.
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Too bad. Sorry for that. Maybe they plan to sell the program to other countries.
So here is a summary :
In the beginning of the 18th century, vampiric outbreaks started to make the news on the margins of the Habsburg Austro-Hungarian empire. First, there was the case Peter Blagojevic in Serbia (1718), and later on similar outbursts of peasant fears in Southern Silesia and Moravia. It is implied that at least part of the phenomenon was related to the backwardness and the localisation of these areas on the frontiers of the catholic world, especially in Serbia : the program assumes that while the Catholics had, since the times of Saint Augustine, an official position stating the impossibility for the dead to come back (if they appeared to come back, it was thought to be an illusion created by demons), the Orthodox faith more prevalent in Eastern Europe, had a less rigid approach to revenants. Therefore, the local peasants would have been able to entertain an enduring belief in vampires.
As a personal side note, we can indeed point out that the Peter Blagojevic incident happened in an area of the Habsburg empire which had only been recently annexed by Austro-Hungaria, in 1718.
Due to the wars between Frederick the Great and the Habsburg, these local legends were brought to the fore. Queen Maria Theresa of Austria did not want her empire to appear as a backward country where peasants go on a rampage, profanating holy burial grounds out of their fear of vampires. She therefore asked her personal doctor / physician, Gerard van Swieten to investigate the latest case, in Southern Silesia.
Van Swieten immediately set out for the northern border and started to develop the practice of autopsies in order to determine the characteristics of supposed "vampires". At that time, the Church was still hostile to autopsies, but it was considered a lesser evil as compared to impaling, decapitating and burning bodies who should have been peacefully awaiting for their resurrection at Judgment Day ! That's why Van Swieten got the full sponsoring of the Queen for carrying on his investigations.
He also recorded the peasant's testimonies and documented his whole enquiry in great details.
What nowadays transpires from his works is that : (1) there was no coherent description of the typical vampire, (2) most signs taken as an indication of vampirism were actually part of the normal yet still unkwown putrefaction process of the human body, especially the emission of sounds by dead bodies (
gazeous emissions due to the decomposition of internal organs), (3) the description of vampire bodies in Southern Silesia (or Moravia - I don't remember) was coherent with the symptoms of Anthrax.
This last point may explain why vampires came to be seen as "blood drinkers", something that the interrogated peasants never said. The program indeed claims that Anthrax caused its victims to develop inflated and blueish lymph nodes on the neck, somewhat reminiscent of the results of a sucking kiss, which may have induced the doctors (not the peasants) to develop the theory of vampires being blood suckers. So this belief may have been a "rationalization" attempt by "learned" people. For the peasant / commoner, all that mattered was that a whole family was being obliterated by an unkwown and evil force, finally attributed to the first deceased person in the group.
Whatever ! The works of Van Swieten first fuelled and then contributed to put a swift end to the "great debate" of the 18th century about "vampires". The topic suddenly fell out of favour. Thereafter, it became more of a theme to be developed by writers and artists , especially in the Anglo Saxon (or even Irish) world (it isn't explained why however), starting with "Carmilla" by Le Fanu. At this point, the program orients itself towards a summary of the evolution of the vampire in litterature and the arts, underlining that it could remain a "modern" theme as the vampire is often a kind of "migrant" in the arts (Bram Stocker's Dracula being a prime example of that : a Romanian expatriate set to invade Britain).
Van Swieten may have been taken by Bram Stocker as his inspiration for Van Helsing. According to Bram Stocker's manuscripts, Dracula was originally set in "Styria", e.g Austria, before the Irish author decided to change the settings to Romania.