Google Play services is used to update Google apps and apps from Google Play.
This component provides core functionality like authentication to your Google services, synchronized contacts, access to all the latest user privacy settings, and higher quality, lower-powered location based services.
Google Play services also enhances your app experience. It speeds up offline searches, provides more immersive maps, and improves gaming experiences.
Apps may not work if you uninstall Google Play services. KB_ViralLive(full)mp4

The next day, a new stream went live on Kaelen’s channel. He was back in the derelict hospital, looking energetic and healthy. He thanked his fans for their "patience during the prank."
But as Leo watched the new stream, he noticed something in the background. In the reflection of a dusty window, Kaelen wasn't holding a camera. He was standing perfectly still, reciting code to a shadow that had no owner.
The video ended, and the file deleted itself instantly. Leo checked the forums. Everyone who had watched it reported the same thing: their front-facing cameras had turned on by themselves at the exact moment Kaelen reached out.