In the video displaying apparatus and method, {HEAD ~ the data} for display is used to determine {TAIL ~ the displayed position} of the child frame in correspondence with the playback time of the parent frame video every time it is readout 
is used to determine
In the video displaying apparatus and method , { HEAD ~ the data } for display is used to determine { TAIL ~ the displayed position } of the child frame in correspondence with the playback time of the parent frame video every time it is readout
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL REL REL TAIL 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