FAQ's
The answer to this question is very dependent on your situation.
SDI is a good option for long distance or for temporary setups. It is durable and holds up to the abuse of a live environment better than an HDMI cable. It is typically used in multi-camera situations along with a video mixer.
HDMI is a good option for cable lengths less than 50 feet. It is the most widely used video connection and provides compatibility with the largest number of devices. It is a great choice for homes, offices, and any other setting with permanently installed wire runs of less than 50 feet.
USB is best used for webcam and video conferencing purposes. It works best with cable lengths below 15 feet. It is the simplest method of connection, only requiring a computer running a compatible software platform to operate.
IP Streaming is a good option if you are streaming live video from a single camera directly to a host like YouTube or Facebook. Most streaming cameras feature an audio input jack which allows you to connect a microphone or external audio feed directly into the camera.