Yup... Just be sure to tap the gray bar at the bottom and switch to the video control window. Then wait about 30 seconds before switching the resolution setting from HDX to UHD.I am not sure. Its possible you could rent it through the Vudu app, but start playing from the Vizio app. Thats just speculation though. Worst case is you do the Vudu workaround where you manaully toggle over to UHD after it starts playing.