Inside Quartz Composer, there is a demo application that can add effect to your movie. This demo application is called MovieFX and can be found in Mac HD ▸ Developer ▸ Examples ▸ Quartz Composer ▸ Applications ▸ MovieFX.
After you've been inside MovieFX folder, you should search for MovieFX.xcodeproj file. Open that file with XCode and from XCode toolbar, choose Build and Go.
Up to this point, you should be able to see new pane opened with entitled MovieFX.