I’m not too keen about Facebook automatically starting videos in my Timeline. I love all of my friends but self-starting videos is a bit like coming over to my home uninvited.
In a test that could make News Feed more engaging and pave the way for video ads, Facebook’s mobile feed will start auto-playing user-uploaded videos in-line when they’re scrolled over for a small subset of US iOS and Android users. Videos play silently until tapped to full-screen, which feels slick. Facebook is expected to soon launch a new video ad unit, which might draw on this test’s feedback.
via Facebook Tests Silent Auto-Play For User Videos In Mobile Feed, Foreshadowing Video Ads | TechCrunch.