► Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubs<br /><br />John Chen, BlackBerry's recently appointed chairman and chief executive, has the daunting task of reviving the lossmaking smartphone maker. The FT's Paul Taylor asks Mr Chen if his efforts are starting to pay off.<br /><br />► FT Technology News: http://bit.ly/1LNlR4g<br /><br />► FT Business: http://bit.ly/1KUK08s<br /><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