Roku is an impeccable video streaming device that enables you to stream high-quality media on your TV through your local internet connection or home WiFi network. It gives you access to thousands of movies, TV shows and live channels. The latest versions of Roku also support 4K UHD streaming. But despite of all this, your streaming experience on Roku also depends on the internet connection that you’re using. Every time you watch something on Roku, you’re persistently streaming high definition audio/video content in real time over the internet. So if your internet connection is slow or there’s too much load on the network at any particular time, then chances are you streaming quality will suffer.