1. A method for generating modified video, the method comprising: (1) acquiring a source video comprising a sequence of 2D image frames, each of the 2D image frames being associated with a respective chronological position in the sequence; (2) identifying a first image frame associated with a first chronological position in the sequence of the source video and a second image frame associated with a second chronological position in the sequence of the source video; (3) combining the first image frame and the second image frame to generate a modified image frame, the modified image frame having first and second opposing sides defining a first dimension and third and fourth opposing sides defining a second dimension; (4) blending the modified image frame with a bridge frame that is a non-solid color, different from the modified image frame, different from the first image frame, and different from the second image frame, to generate a blended frame, wherein the blended image frame includes first and second non-overlapping portions, the first portion having the first dimension and including a first selected portion of the modified image frame, the second portion having the first dimension and including a second selected portion of the bridge frame.