Facebook this week announced new features for News Feeds videos, along with an app for TV. News Feed videos now have sound turned on by default in mobile devices. This can be disabled in the Settings menu. A larger format to present vertical videos now is standard on iOS and Android devices. The feature became available as a preview last year. A Watch and Scroll feature lets users minimize the video they’re watching and drag it to any corner of the screen so they can continue browsing their News Feed while the video is playing.