Watch Out, Live Video Is the New Data Hog 

Live video consumes less data than high-definition video because it is lower quality. But watching just five minutes of Periscope broadcasts on a smartphone was equivalent to nearly two hours of Web surfing or sending and receiving 300 emails, according to tests by The Wall Street Journal. At that rate, watching five minutes daily over a month would consume nearly 50% of a 2 GB data plan costing $30.

Source: Watch Out, Live Video Is the New Data Hog – WSJ