I have Canon HV20 camera, and I transfer HDV video to computer
using Firewire cable.
Software depends on computer and operating system.
If you have new computer with Windows Vista it should have drivers and
Windows Movie maker or other standard program that supports HVD cameras.
If you have Windows XP you may have some problems with drivers.
Turn on camera, and connect Firewire cable with Windows XP running.
You may have to try connect and disconnect a few times.
The system should pick up new device plugged in and find drivers for it.
You may need administrator permissions on a computer for that.
To transfer video I use free program CapDVHS
You can download it for example from
http://home.earthlink.net/~weathersix/other.htm english-font-optimised version of "CapDVHS v0.3.0.6".
The download-link (
http://home.earthlink.net/~weathersix/CapDVHS_0306a.zip)
read also forum
http://dvfilm.com/
the video is saved as MPEG2 HD transport stream file that you can edit with any video software
or play if you have MPEG2 player if your computer is fast enough (about 2.8 GHz).
You may use for example free Elecard video player.
For example, I made a few HDV video clips with Canon HV20 camera, than transferred video
to PC, edited, deinterlaced, and encoded with Windows Media Enoder Pro
and uploaded few clips that you can see on HD web site
http://www.homehdvideo.com/