► Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubs<br /><br />Lex’s Robert Armstrong and Joseph Cotterill assess the business model behind Uber, the driver-hailing service, after the Silicon Valley start-up completed a $1.2bn funding round this week, giving the company a huge $40bn valuation.<br /><br />► Lex: http://bit.ly/1I14JZF<br /><br />► FT Technology News: http://bit.ly/1LNlR4g<br /><br />Twitter https://twitter.com/ftvideo<br />Facebook https://www.facebook.com/financialtimes
