Live streaming from a video camera can require a video encoder interface to connect to a computer. The video production software can then push out the stream to allow viewers to watch.
There are a number of options to achieve this depending on your camera features. Some older cameras only provide HDMI output and hence need an envoder to feed it into the Production software.
Some cameras can use WiFi or LAN to push directly out to allow viewing.
The items below allow varying levels of output at differing cost.