Periscope: The app that lets you stream live video

Periscope is an app that lets you stream live video from your handset, or as a viewer, lets you watch streams you like and interact with them live via onscreen chat.

The streams are watchable for 24 hours, but the app can deplete the viewer's mobile data allowance.

BBC Click's Kate Russell reports.

More at BBC.com/Click and @BBCClick.