Below I embedded videos of Nikolaos Michaloliakos, the leader of the Golden Dawn party, giving his victory speech to the media (translated into English) and answering questions on the street. I added a Russia Today video as well. If you want more info on this political party, VICE interviewed a member of Golden Dawn a few days before the election. Interesting turn of events. I also found a chart of the opinion polls going back to 2009. Look at Golden Dawn's trend line since November 2011 (black line).
Greek election opinion polls (source: Wikipedia).