I skimmed your manual and by all indication the disks haven't been finalized, I could see no reference to setting the recording to dvd video instead of dvd vr mode?
download and install this program on your computer, one with a dvd burner I would assume
http://www.imgburn.com/In read mode the disk should show the pertinent information in the right hand screen like this
QUOTE
BENQ DVD DD DW1650 BCIC (ATA)
Current Profile: DVD+R
Disc Information:
Status: Complete
Erasable: No
Sessions: 1
Sectors: 2,135,712
Size: 4,373,938,176 bytes
Time: 474:38:12 (MM:SS:FF)
TOC Information:
Session 1...
-> Track 01 (Mode 1, LBA: 0 - 2135711)
-> LeadOut (LBA: 2135712)
Physical Format Information (ADIP):
Disc ID: CMC MAG-M01-00
Book Type: DVD+R
Part Version: 1
Disc Size: 120mm
Maximum Read Rate: Not Specified
Number of Layers: 1
Track Path: Parallel Track Path (PTP)
Linear Density: 0.267 um/bit
Track Density: 0.74 um/track
First Physical Sector of Data Area: 196,608
Last Physical Sector of Data Area: 2,491,711
Last Physical Sector in Layer 0: 0
Physical Format Information (Last Recorded):
Disc ID: CMC MAG-M01-00
Book Type: DVD-ROMPart Version: 1
Disc Size: 120mm
this is a proper dvd video