► Subscribe to FT.com here: http://bit.ly/2r8RJzM<br /><br />Central bankers showed signs of optimism at their annual meeting, but concerns over the impact of technology remain. The FT's Sam Fleming reports from Jackson Hole.<br /><br />Filmed by Sam Fleming. Edited by Paolo Pascual. Additional footage from Reuters. <br /><br />► Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubs<br /><br />For more video content from the Financial Times, visit http://www.FT.com/video<br /><br /><br />Twitter https://twitter.com/ftvideo<br />Facebook https://www.facebook.com/financialtimes