This film was planned as only an account of the event we carried out on the server while introducing the Death Knight Class. But when I saw the whole DK quest chain, I loved it and decided to show it as well.
What you'll see at the beginning is the event itself. We placed some game objects with clues around Azeroth and the players were supposed to follow them and find their final goal. At the end, however, we tested how carefully they read the clues and asked them questions relating to them (and punishing if they did not know the answer). The event was very challenging to most of the participants, as the server is not an English speaking one. The reward was getting a DK one day ahead of the rest of the server and being feaured in this film as well :)
The second part you may find boring, as it is only a mere depiction of the chain and of the Death Knights themselves.