How I Use It
I use Green Screen to help students make unique videos that incorporate presentations with backgrounds. We've used it to create school newscasts, student presentations, and more. I've only just started using this app, but I can easily see the potential to make very sophisticated presentations with little effort.
The description makes it seem like you can use ANY background, remove it, then add another layer and it works. However, I've found that investing a few dollars for an actual green fabric (got mine for $5 at a fabric store) makes the video layer much easier to remove. There are three layers available: 1) video with green screen 2) image/background layer 3) extra layer to add animations. Once you have these basic concepts down, and are able to remove the background of the video (use the Chroma Tool), putting together a professional looking presentation is a breeze!