wherein data of the first video, {HEAD ~ data} of the second video and {TAIL ~ the metadata} have been recorded on a single non transitory recording medium in advance 
of
wherein data of the first video , { HEAD ~ data } of the second video and { TAIL ~ the metadata } have been recorded on a single non transitory recording medium in advance
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH