This amazing HDR (High Dynamic Range) video demonstration was shot using two Canon 5D Mark II’s.
From Soviet Montage:
The cameras are configured so that they record different exposure values, e.g., one camera is overexposed, the other underexposed. After the footage has been recorded, we use a variety of HDR processing tools to combine the video from the two cameras, yielding the clips you see above.
HDR Video provides filmmakers with many exciting new opportunities. Not only can HDR video create interesting effects, it can also allow for even exposure where artificial lighting is unavailable or impractical. For example, when a subject is backlit, one camera could be set to properly expose the subject, the other the sky, resulting in video with perfect exposure throughout.