A stream is pretty much a stream. Some services will let you chose to lower your quality settings and specifying a lower resolution may be an option as well. Some routers have the ability to limit bandwidth which will force streaming devices, including Roku, to get by on less bandwidth. (At the expense of picture quality.) If you need to force it to be super low, then you might be better off with Dish Network or DirecTV.
Banned but back. Because why not?