50p, 60p, 25p, not UK prices, but frame rates, but what are frame rates? Dr Steve Bagley explains why digital video looks different at different FPS. Problems with Interlacing: https://www.youtube.com/watch?v=rCUjvK-zbHw Gamer's Paradise: https://www.youtube.com/watch?v=HZzdXR0bV8o Password Cracking: https://www.youtube.com/watch?v=7U-RbOKanYs Cookie Stealing: https://www.youtube.com/watch?v=T1QEs3mdJoc http://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: http://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com/