This is the possibility to add your video ad in a Video or a Live Facebook stream. It won't be a pre-roll like YT, but more of a mid-roll and will only be shown during a video longer than 90 seconds.
More info; https://www.facebook.com/business/help/257808937971866
Video is killing at the moment on FB so .... go go go!
AWESOME!!!! Thanks for the info.
I run pretty hard on YT in-stream, so this should help a ton.
Video is the future!