For finding the 4k Ultra HD channels on Roku TV, you need to follow some instructions. Press the home button on your Roku remote and select the streaming channels by scrolling down. Following this, to explore the 4k Ultra HD channels of your interest, you need to choose the 4K UHD Content Available that will offer movies and series in HD. To get more information on Roku channels, we are always ready to assist you. Learn how to setup Roku device and how to setup Roku stick.