Roku isn't a streaming channel, it's a device that you plug into your TV. It communicates with your wireless router (which could be in another room; mine is) and brings in the streaming channels, such as Netflix, Amazon Prime, Acorn, etc. to your TV set. Sounds complicated, but it's really very simple. The Roku stick is not particularly expensive, it's about $40.
To answer the first comment, I think there is a difference between that song Kate Smith sang, and All in the Family. (I didn't watch The Jeffersons, so can't comment about that.) All in the Family wasn't promotiing bigotry, it was just the opposite. Archie Bunker was portrayed as an ignorant fool, though he improved as the show continued. And from what I remember of the Jefferson family when they appeared as Archie's neighbors, they certainly weren't the "darkies" in Kate Smith's song either. They, too, made fun of the white bigots, though in a kidding way.