Coming to Android & iOS over the next few weeks... Autoplay on Home! Preview a video while you scroll or watch the whole thing on mute w/ captions. To turn on/off or customize to play only on WiFi, go to Settings > Autoplay > Autoplay on Home. More → https://goo.gl/pzMY78 pic.twitter.com/Bm2pDeMqOx
I know my comment is a little bit late, but I have a suggestion for this feature (if it's not already been suggested), instead of scrolling and staying on the video thumbnail, hold down the video thumbnail for 3-5 seconds to autoplay the video.