► Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubs<br /><br />Facebook paid $19bn for WhatsApp, the messaging service -- or should that be $40 for each of its 450m users? FT Lex's Robert Armstrong and Joseph Cotterill discuss what metrics to apply to the deal.<br /><br />► Lex: http://bit.ly/1I14JZF<br /><br />► FT Business: http://bit.ly/1KUK08s<br /><br />► FT Technology News: http://bit.ly/1LNlR4g<br /><br />For more video content from the Financial Times, visit http://www.FT.com/video<br /><br />Twitter https://twitter.com/ftvideo<br />Facebook https://www.facebook.com/financialtimes
