Starting now, when video results show up in the video carousel, just like text snippets for text results, you’ll see video previews. This feature is only accessible via the Google app for Android and Chrome on Android.
At first, this feature is only available in English and in the US, but Google plans to expand the globally and in all languages in the future.
By default, previews only play when you’re on a wi-fi connection. To enable previews on mobile networks or to opt out of this feature, visit the settings menu within the Google app or settings for Android Chrome.