Every streaming service works differently with lower bandwidth. Youtube works pretty good too. Just don't rule out streaming because of only 2mb bandwidth. You don't need 50mb. That's cable company sales pitches.
I have been using ChromeCast which works just fine. It was easy to install and use with my ChromeBook. But, I would rather NOT have to stream everything on HBO because I don't have an unlimited data Internet plan regardless of speed. I hope HBO comes to their senses after GOT is done and everyone dumps their HBO Now and HBO GO. Then I can go back to watching it anywhere in the house instead of one TV.