Keith streams on Netflix and it looks terrible at the beginning. Leo says that Netflix uses an adaptive algorithm that starts off at its lowest resolution and then gets better once it guages his bandwidth. If it gets worse over time, though, that means that his bandwidth is inconsistent. Since Keith is using wireless, it could be the Wi-Fi dropping or pausing briefly, dropping packets. Keith needs to wire his router to the TV. If that doesn't fix it, he can look for the Quality of Service (QoS) setting that will enable him to set priority over what traffic he wants.