(AP) — Video-streaming company Hulu is introducing an ad-free version of its subscription service for $4 extra a month as competition for streaming customers heats up. On Tuesday, Amazon said subscribers of its $99 annual Prime membership program will be able to download some shows and movies to watch offline. Users will now be able to download shows like Downton Abbey and The Good Wife, HBO shows including Girls and Veep and movies including The Hunger Games: