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Why video inputs/outputs on a receiver?
Why?
Basically, there are three major reasons to make use of the video inputs/outputs on the back of a receiver...
1- To make use of the onscreen display function so that when the receiver's remote button is pressed, that function e.g. "mute" is shown on the display device's screen. In addition, many modern receivers have complicated setup options and calibration screens available ONLY via the on screen display. Some products are IMPOSSIBLE to set up correctly without using the video connection to your TV set.
2- To provide more video inputs. This is particularly useful these days with so many display devices being available. For example, if you have a TV that only has 2 video inputs, what do you do if you have a DVD player, a VCR, a game console, a satellite setup, a laserdisc player etc etc. How do you hook all of these devices up to a TV that only has 2 inputs available???
3- Increased convenience of video switching along with audio mode switching. The receiver acts as a control center, handling all the routing for you.
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How to connect?
There are various types of video-switching receivers available. The most common ones are able to switch composite video. Some others are able to switch both composite and s-video, and a few are able to switch component video as well. What you need to do is connect your TV/display device to the receiver's video output using the composite video connection, the s-video connection if available on the receiver, and the component connection if available on the receiver. Then you basically connect all of your video devices to their respective locations on receiver's video inputs. So now, if you want to watch the game console (s-video for example) on the bigscreen, you simply switch the TV to the s-video setting and there it is. To watch the DVD (component for example), you switch the TV to the component setting, etc.
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