The brief video report from RT is posted here to introduce an article following the video that provides an excellent understanding of futures commodity markets, their history, and the deregulation of them which has led to the crises as depicted in the video.
I encourage you to gain a deeper understanding of this issue by reading this report entitled "How Deutsche Bank, Goldman Sachs and Other Financial Institutions Are speculating With Food at the Expense of the Poorest from Foodwatch (Germany).