A system for preparing data and video sequences to enable a viewer to scroll content in a plurality of directions including a first and second direction, the content including at least one element in motion, the system including a video sequence preparation module to prepare the video sequences including a first and second video sequence, each video sequence including still images, each still image including at least part of the content, at least some of the still images including the at least one element, the video sequences being prepared such that playing the first and second video sequence effects scrolling the content in the first and second direction, respectively, and a switchover determination module to prepare the data including corresponding switchover points in the video sequences for switching between the video sequences and therefore for switching the direction of scrolling by the viewer. Related apparatus and methods are also described.