Hi , if a help i found your user guide
http://www.panasonic.com.au/Support/Customer+support/Downloads+and+documentation
enter NV-DS50 in " enter search key words" search field
(model is NV-DS50A)
usb out is for still pics stored on standard onboard sd-card
and should be detected as a removable drive by the host computer
Video out appears to be via firewire and should be supported by a standard firewire port on computer (or installed usb or expansion card) however the camera oem XP Windows era video capture program may not support Windows 7 os , so try by using XP compatibility mode either by Windows Virtual (emulated) PC
http://www.microsoft.com/windows/virtual-pc/download.aspx
or try manually designating appropriate Windows version in the various program setup and subsequent application file properties
http://windows.microsoft.com/en-US/windows7/What-is-program-compatibility
Uninstall oem capture/edit program then reinstall using XP sp2 compatibility mode , of first the setup file (even if on the oem supplied cd disk)
properties > compatibility , check "XP sp2" and also check "run as administrator"
then access the expanded setup file folder (if applicable) after running the setup disk and enter properties for all application type programs found and configure as per setup file, then run the uncompressed setup program
then access the program files folder for the capture program and configure all application programs found as per setup compatibility
This will show Windows 7 how to process a nominally non-supported driver setup and application programs of early version windows for now supported processing
(knock on wood)
however if problematic you can connect the camera s-video out (designated for a vcr playback) to a s-video-in capture device - usb or expansion card video capture device installed on your computer, and stream/save in real time
ps - camera creates quite low resolution images at mx 640x480 so maybe consider a camera upgrade if quality viewing on high resolution LCD displays and hardcopy large format printing is desired