Modern PCs lack analog TV tuner inputs. You will need a USB video capture device (e.g., Startech SVID2USB23, Elgato Video Capture) to connect VCRs, camcorders, or analog TV sources.
To use , you typically need a serial number or product key provided with your hardware. If you've lost yours, legitimate keys are often bundled with the specific USB capture device you purchased. Finding Your Honestech TVR 2.5 Serial Number serial honestech tvr 2.5