Total television viewing: what’s included? 12 May 2020 BARB introduced a new definition of total television viewing together with the launch of unduplicated programme reach and time spent viewing data in January 2020. The new definition is called total three-screen viewing. Once router meter data are available, smartphones will be included in the definition, which will then be known as total four-screen viewing. The previous definition of television viewing is now known as C7 TV set viewing. This table outlines the differences between what’s currently included in the two definitions: