YouTube is putting its Shorts -- its vertical, looping, short-form videos -- onto the biggest and most horizontal screen in your life: the TV. Google-owned YouTube, which has 2 billion monthly users, is the world's largest source of online video. With Shorts, Google's massive video site is trying to compete with the sensation around TikTok, the short-form social video app owned by Chinese company ByteDance. YouTube launched Shorts more than two years ago, starting in India and then widening it to the US and other countries. By bringing Shorts to TVs, YouTube is breaking the vertical, short-form format out from...