Read this: BBC iPlayer - Help - Frequent Questions about the YouView BBC iPlayer Service

Summary: Listed below are frequent questions about the new BBC iPlayer service for YouView. However, if you want to force an update or wish to ensure that you are running the latest version of iPlayer, you can do this manually by Select the Blue YV button on your remote control. Select Device Management which is available via Settings. - iplayerhelp.external.bbc.co.uk