Abstract
Head-mounted displays (HMDs) and spherical ("360") video are an important new medium. Watching a spherical video in an HMD is a compelling experience the first time, but the user soon discovers they cannot move. Moving a user's viewpoint between spherical videos recorded at different locations remains without a general solution. In the Edinburgh Festival Explorer the user is given a better sense of the physical relationship of the video locations by placing windows into video spheres in their geographical positions, which the user can navigate interactively.