You can do video tranfer using USB. It is possible but is not the best solution for video capture. Firewire can transfer more data via the firewire cable into your computer. But if that's all you have just get a device that allows you to capture USB into you computer workstation.
Here are some products:
Pinnacle Studio MovieBox 9 USB 2.0
ADS Technologies Instant Video MPX (USBAV-708)
Derrick Freeman -
Video Streaming and Compression Specialist -
http://www.geniusdv.com