Documentary about Vlad Dracula

Third party of the documentary speaks about the medieval town of Sighişoara, the house where Dracula was born in 1430 - 1431, his strange relation with John Hunyadi, governor of Hungary and ruler of Transylvania, a hero of Christian World. Hunyadi's castle in Hunedoara is also presented, with it's gothic architecture and his evolution in time. The legend explains history of Iancu of Hunedoara (John Hunyadi) by him, killing with an arrow ravens that steal his royal ring. Therefore the Hungarian kind decided to give him the lands around Hunedoara, as well as put the raven on John's coat of arms.
Then we can see the ruins of Vlad's princely court in Târgovişte, his first residence as Wallachian ruler. Chindia Tower is also to be seen near the ruins. While is true what the documentary mentions, that Vlad's punishment methods are similar to the one use during middle-ages by other rulers like Ivan Third, Luis 11th, Families of Visconti, Sforza and Borgia, Richard IIIrd or The Inquisition. However I'd say the punishments of Dracula spread allover Europe because he exposed them, he used terror to impose law and order in Wallachia. Is unbelievable people were used to this, were watching this "spectacles" with a strange joy, satisfaction and happiness.
While we are not sure about how Vlad Dracula died, the theory presented (his killing by one of his men) could be true, but there are no proofs to sustain this.