receiving a request for {HEAD ~ a replay} of a broadcast content selected by the user so as to replay a same video stream again after stopping the video stream of {TAIL ~ the broadcast content} 
receiving a request for { HEAD ~ a replay } of a broadcast content selected by the user so as to replay a same video stream again after stopping the video stream of { TAIL ~ the broadcast content }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL