We will use OBS as an example here, but other green screen software for streaming will work in a similar way. Once you have your recording space ready, you can then move on to configuring your software. Then add your video capture device under Source. You can then choose either a looped video or an image that will be used as a background. Just make sure that your video capture device is listed on top of your chosen background or video. Now add the chroma key. First, right-click on your added Video Capture Device under Sources. Then click on Filters located towards the bottom of the list. Once the filter box has appeared, click on the + icon at the bottom left of the window. Then select Chroma Key.