Video capture devices come in two main types: PCIe circuit boards you install inside your computer or external boxes that connect via USB interface.
Magewell video capture devices that can capture record audio and video from sources such as HDMI, DVI, VGA, S-Video, component, or composite
Stream: The process of transmitting and receiving data over a network as a constant, continuous flow.
Broadcast: Distributing and sharing video and/or audio content with any mass audience.