A video switcher makes it possible to connect more than one device to a single A/V port. The user only needs to change the active port on the video switcher to see that particular device on the television - assuming the TV is turned to the A/V or Video 1 channel.
Disclaimer: The video switcher is an optional addition to a home entertainment system. It is not mandatory for the operation of any device, but it will eliminate the need to manually plug in each device when requiring use. A video switcher like the one in this tutorial costs about $15 at a store like Target.