It's not a new film, but I always liked the biography of the Temptations that was made in 1998. The story is well known and the actors are terrific. But it's the music, much of it written by Smokey Robinson, that really stands out. If you don't have a Roku box, you can still watch it free online at their website.

Meantime, Roku has just partnered with Warner Music to start a series of new all-music channels for its service, also available for free. Details here.