Yes, 4K HDR movies and TV shows can be viewed on any Roku® streaming player that supports 4K HDR and has been properly set up. Before you start watching 4K HDR content be sure you understand the requirements for streaming 4K HDR content.
Channels that provide 4K HDR content are installed from the Roku Channel Store.
What is the Roku Channel Store?
How do I find 4K HDR movies and TV shows?
From your Roku device, browse the 4K Spotlight channel to find 4K HDR movies and TV shows.