These are models without PC connection port, therefore; the direct connection from DVDCAM to PC via USB cable is not possible.
In order to capture videos recorded on 8cm DVD disc media into PC, you would need DVD drive can hold 8cm disc media and read your choice of disc types such as DVD-RAM or finalized DVD-R/DVD-RW/DVD+RW etc. The 3rd party video editing software should be used.
These are models with PC connection port, however; there is no software supplied. Therefore, the 3rd party video editing software should be used.