Guardian: YouTube is a decade old, and for the first half of its history at least, was a service for watching online videos on your computer. In 2015, as it looks forward to the next 10 years, YouTube’s emphasis is firmly on a smaller screen.“For us, most of our focus is on mobile: product development for mobile, content development for mobile, making sure mobile video works on carrier networks all around the world. It’s all mobile, mobile, mobile,” said Robert Kyncl, YouTube’s head of content and business operations. “We think that phone is the remote control for your life, and it’s definitely the remote control for your video.”