Inside Story - Who is buying ISIL's oil?

Who are the individuals and groups involved in refining and selling ISIL's oil? And where does that oil end up? Presenter Hazem SikaGuests talks to Shwan Zulal, managing director of Carduchi Consulting; Carole Nakhle, director of Crystol Energy; and Afshin Shahi, director of the Centre for the Study of Political Islam.