sentences:  The catch-up TV section of on Demand launched on 26 September 2012, featuring ITV Player, Demand 5, Sky TV (Sky1, Sky Arts, Sky Atlantic and Sky Living), Sky Sports and Sky Movies.BBC iPlayer arrived on 30 October 2012, while 4oD launched on 18 March 2013.Download content in on Demand is supported by progressive download, meaning it downloads in the background while the user is watching.