Periscope - Live Video

The following description comes from the Google Play Store description of the app:

Periscope lets you broadcast and explore the world through live video.
See where news is breaking, visit a new place, or meet people and share interests - all in real-time.

Use Periscope to:
• Broadcast live video and interact with people through hearts and comments.
• Discover popular live video streams from around the world or search for broadcasts by location or topic.
• Missed out on a live video? Don't worry - watch the best parts with replay highlights.
• Instantly share your live videos to Twitter and other social networks.
• Broadcast privately to specific followers or friends.