The video draws attention for how terrifying and real it looks. While it may be quietly an edited broadcast, media such as The Sun, Alerta News 24 and Daily Mail replicated it on their websites.
It is not yet known who the person who walked through the door was, but quite possibly the explanation has to do with a theory similar to that of the user who pointed to a member of the Greek Orthodox Archdiocese as the "culprit" The Grim Reaper Theory is how it is called in many places in the West to a figure that represents death.