I got an email from Roku, indicating they have added a channel of their own. Roku TV with free movies.
Also saw it last night, on my main TV then tried it. It does have commercials. So the movies are interrupted. I let the movies about Cassius Clay, put me to sleep.
When I started my journey to streaming several years, Roku was my 2nd device. (the 1st had been an Insignia Best Buy branded "blue-ray DVD and streaming player."
I swear by Roku. (3 now at my house, plus I gave one to my sister--newest, cheapest Express model)