This is an interesting software project that one of my coworkers previously worked on. Initially it was called “Concert Cam,” but later when they started bringing it to other non-concert venues they just called it “big green button.” It is a button on a podium that sends a wireless message to another computer that then does something via a web API on the Internet, like taking a photo and uploading it to Facebook. Pretty simple code.
20190712/https://bendyworks.com/blog/concertcam