Get ready: video ads are set to become a permanent fixture in your Facebook feed by late April or early May. The social network has been testing 15-second spots since December and, after a few delays, officially started offering them as an option to select advertisers today. Both mobile and desktop ads will autoplay in your feed, but wont have audio unless you click on them (so you wont have to worry about disturbing your cubemate when youre Facebook stalking your ex).