displayed area information representing a displayed area of {HEAD ~ the second video} in the first video when the second video is switched to displaying at the time, and designate {TAIL ~ a position} in the first video in which the second video is displayed when the second video is displayed at the arbitrary point of time based on the metadata; and 
displayed area information representing a displayed area of { HEAD ~ the second video } in the first video when the second video is switched to displaying at the time , and designate { TAIL ~ a position } in the first video in which the second video is displayed when the second video is displayed at the arbitrary point of time based on the metadata ; and
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH