Thanks for the inquiry.
After reading your note, it seems like you asking if you can stream through your Roku Streambar alone, is that correct?
Yes, your Roku Streambar when connects directly to your TV will let you stream movies and TV shows.
For more information, see this additional resource: Getting to know your Roku® Streambar® | Official Roku Support
Hope you'll find this info useful. Let us know in case you've still got any questions.