However, despite such demand there has been {HEAD ~ no conventional method} for giving {TAIL ~ a changeable displayed position} for the child frame in accordance with the change of the parent frame video as described above 
for giving
However , despite such demand there has been { HEAD ~ no conventional method } for giving { TAIL ~ a changeable displayed position } for the child frame in accordance with the change of the parent frame video as described above
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH