If it's a newer camcorder, you'll likely need a FireWire cable to transfer video from the camcorder to your PC. Older camcorders use composite or S-video out and the Dazzle suggestion above would likely work best. If you need help identifying the FireWire port on your computer, here's a guide to
FireWire on PCs If your PC does not have FireWire, you'll need to either get an external capture device with FireWire or purchase a FireWire card.