US Patent 10448119 Methods and systems for unfolding video pre-roll

Method and accompanying system for an unfolding video pre-roll. A primary video having a fixed play length is presented and, in temporal proximity to at least a portion of the primary video, an unfolding video having a variable play length is presented to the viewer. If an interaction is received from the viewer during the playback of the unfolding video, the play length of the unfolding video is extended by adding a seamlessly connected video segment to the unfolding video, which is continuously presented to the viewer without interruption.