The Bt878 TV Card - Video Capture Windows Driver refers to the device driver software for a video capture card that uses the Bt878 chipset, typically manufactured by Brooktree (now part of Conexant Systems). This chip was commonly used in TV tuner and video capture cards for older PCs, allowing users to capture analog video and audio signals from devices such as TVs, VCRs, or camcorders.

The driver software allows the Windows operating system to recognize and communicate with the capture card, enabling you to use the card for tasks like video editing, TV watching, or capturing video from external sources.