You can watch live streams on Periscope on any iOS device running iOS 8.1 or later, including most iPad models, if you install the free app. Periscope is also available on Apple TV and Google Play for Android devices. You can also watch Periscope broadcasts on your desktop or laptop browser if you have a direct link.
Periscope allows people to stream live video to anyone around the world. The app is owned by Twitter so it features a lot of Twitter integration.