time information representing {HEAD ~ time} in the first video within {TAIL ~ the displayable period}, wherein the displayable period is not the entire first video; and 
time information representing { HEAD ~ time } in the first video within { TAIL ~ the displayable period } , wherein the displayable period is not the entire first video ; and
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH