Apple TV and an iPad with Airplay isn’t a bad set up either.
I have both an Apple TV puck and a Roku puck. The Apple TV seems to be a better device, the quality being better. Another thing is that I can watch YouTube on Apple TV, but not the Roku puck. Anyone know if it's possible to use YouTube on Roku?
I stream pictures and movies from a Mac in another room to the Apple TV in the family room. All my movies are stored on an external HD tied to that Mac, after having been downloaded from the Internet (all HD size movies). Downloaded once, then streamed to the Apple TV for play on my HD TV as often as I wish.
My toddler granddaughters love watching "Masha and Bear" cartoons on YouTube, most are in Russian but easily understandable even by one-year-olds; check it out!