Progress bars, what are they and how do they work? Dr Valerio Giuffrida explains and goes through an implementation of a progress bar. https://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: https://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at https://www.bradyharanblog.com/ Thank you to Jane Street for their support of this channel. Learn more: https://www.janestreet.com/