After Effects Green Screen Virtual Studio Tutorial
http://www.virtual-studio-set.com/
Adobe After Effects tutorial explaining how to add a custom virtual backdrop to your green screen footage. The tutorial also explains how to replace the video in your virtual set (if you have a place for video).
The techniques in this video are explained through After Effects, but could be applied to just about any video editor that allows for color keying including tri-caster, final cut pro, premiere, sony vegas and video toaster.
The virtual set used in this video is from http://www.virtual-studio-set.com