YouTube is rolling out YouTube Autoplay on Home, automatically playing videos on your home feed to provide a better previewing experience.
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.
— Team YouTube (@TeamYouTube) December 3, 2018