Gabe, my experience Netflix uses about 250MB for a 45 minute show set to low definition. They also have a new download option for many shows.
I like the way once the playback definition is set I don't have to worry about it no matter which device I'm using: laptop, TV, tablet, etc.
Don't have DirecTV so that's one thing I don't need to worry about eating data without knowing. They do have a streaming service called DirecTV Now but have no idea if the user can manually set the definition being sent.
PS: Streaming works fine on my Gen 4 also. :smileyhappy: