Apparatus and method for displaying contents and, server for providing seamless contents

Devices in which content is the play bar image corresponding to the user when interface received a reproduction request of the content from, either the total duration of the content display unit, content that displays the frame of the plurality of frames of the content on the display of the device a communication unit that displays to overlay on the displayed frame, receives the viewing history information of the external device from the platform the server for playing bar display section, the content shown in the first bar reproduction shown one point image corresponding to the reproduction start time of the displayed frame do.