Bloomberg: Yahoo has unveiled a new messaging app that lets people use live video to check in with friends, a bid to capitalize on the growing popularity of mobile tools like WhatsApp and Snapchat. The new service, called Livetext, lets users communicate via video — without audio — and text messages. Livetext doesn’t include audio because communication is enhanced when it’s silent, the company said. “We want to make sure that there’s no inhibition to answering and connecting.”