The olloclip is not just for photos, you can use any of the lenses for video too. The iPhone crops the video making the field of view more narrow than in the photo mode. The olloclip widens the field of view with the fisheye and wide-angle lenses and magnifies the video in the macro.

The olloclip is a quick-connect lens solution for the
iPhone and iPod Touch

olloclip: Sunrise over the Pacific from
the Huntington Beach Pier

olloclip: Sunrise over Monaco

olloclip introduction video: iPhone Quick-Change Lens System