The large One Button Studio (112B Shafer Library) has the addition of a green screen as of Fall 2017. The green screen is folded up and off to the side, but you can unfold the screen and move it around to where you need it. Four of the computers in Shafer Library have Camtasia video editing software on them (they are marked with the green Camtasia logo). The software will allow you to edit out the green screen background and replace it with whatever you need.
For instructions on how to use the green screen and edit the video, ATS put together a video guide: https://youtu.be/IIWykHEI8ZY