Flatten the wrinkles out of the screen with an iron, if using a sheet or blanket. Stretch out the fabric until the surface area is smooth.
Shoot your primary video with your subjects positioned in front of your green screen. Then shoot the secondary video -- the footage you want to use to replace the green background.
Download the plug-in ShaderTFX from the Rehan FX website -- the stable version. Click “Run” when the pop-up box emerges.
Save the File. Save as “greenscreen.xml” in C:\Program Files\MovieMaker\Shared\AddOnTFX. After saving it, double-click the file to install the software.
Open your primary video project. From the “File” Menu, scroll down to “Open Project” to add your video to your timeline.
Import your background video or image -- the one you'll use to replace your green screen. Add it to the timeline with your primary video.
Move your secondary video from the timeline on top of your primary video. Drag and drop it to where it covers your entire primary video on the timeline.
Open the tools Menu, and scroll down to Transitions. Find Chroma Green A in the list of choices, and select it. Once you drag and drop the secondary video on top of your primary video, Windows Movie Maker prompts you to choose a transition.
Click “Fade,” if your transition automatically prompts you from the timeline. Drag the green screen transition setting to your overlayed videos.
Review your video. The foreground should be playing your primary video, while the background shows your secondary video.