how to render for video

ive recently been using voodoo, and ive gotten it to work and sync up pretty good, but i cant get it to render with the video. ive tried rendering the video, then chromaing out the blue, but that doesnt work 100%. is there a way to make it render both together, where the 3d is rendered into the video within blender?

Yes. If you use blender’s VSE (video-sequence-editor), you can hit spacebar and add a “scene” video track. The VSE setup is shown in SR-4 by default.

so scene is what the camera sees right? so, i placed a scene, then under it, i placed my video track. i checked off do sequence, but it still only shows a cube with a blue background.

can i use nodes or something?