I finally got around to do another tutorial video on Blender, and this time I'm giving you a look at compositing and green-screening. It isn't necessarily hard to do, but once you get the hang of it, a lot of possibilities open up for you.
On par with industrial solutions such as Adobe Premiere CC and Apple's Final Cut Pro X, Blender provides you with an in industry-strong toolset for chroma, color, and matte keying.
Further, through combination of other nodes, and possible combination of your existing 3D-scene, compositing truly enhances the possibilities at hand to increase the level of your production.
Blender is a free and open-source 3D rendering and video editing solution.
http://www.blender.org