The google home app will walk you through the steps to set up your chromecast device. this includes chromecast and chromecast ultra. if you've already set up your chromecast on a mobile device, you don't need to set it up again on a different mobile device if all devices are on the same wi-fi network.. Stream entertainment to your 4k ultra hd tv in striking detail. no 4k tv? no problem. chromecast ultra automatically optimizes for the maximum your tv can deliver.. Need to report the video? d