Sony just unleashed a torrent of videos for its new Xperia phones. The flagship Xperia XZ Premium is the undisputed star of the show with a whopping four videos just for it. The Sony Xperia XZs in comparison got just one, though keep in mind that it shares its Motion Eye camera with the XZ Premium. You know, the first mobile camera to hit 960fps. The Xperia XA1 video also focuses on the camera - with good reason too, it's the same camera module as the Xperia Z5 and original XZ! (well, without the additional sensor that enhances the XZ, no 4K video either).
Source: http://www.gsmarena.com/xperia_xz_premium_steals_the_spotlight_from_its_siblings_in_these_promo_videos-news-23670.php