If you are searching for this recently, you likely encountered the 2020 sequel, often called "The Win."
Take This Lollipop, created by Jason Zada, was a 2011 viral interactive horror experience that used Facebook data to show users the risks of oversharing personal information online. The project, which won multiple Webby Awards, was later updated into a webcam-based experience centered on modern video call platforms. You can learn more about the project at the Take This Lollipop website. wwwtakethislollipopcom verified