1. A method comprising: receiving a unit of video content, wherein the unit of video content is coded in a bi-prediction mode; determining a motion vector predictor candidate set for a first motion vector for the unit; determining, by a computing device, a first motion vector predictor from the motion vector prediction candidate set for the first motion vector; and calculating, by the computing device, a second motion vector predictor for a second motion vector for the unit of video content, the second motion vector predictor calculated based on the first motion vector or the first motion vector predictor.