This will work for the vast majority of videos on the web today — including, but not limited to, YouTube. Indeed, as Emily Moxley, Google’s director of product management for this project, told me, any video on the web is eligible for inclusion, though Google may not have a preview for some of the newest videos available yet because it takes the servers a bit of time to build the previews.
Even though video is getting more and more popular, it’s no secret that it’s not always the most convenient way to get information. Ideally, Google’s new feature will remove at least some of this ambiguity so you know that you won’t be wasting time on some boring gongoozling video when you’re looking for the real thing.
Unsurprisingly, Google decided to use some of its machine learning smarts to enable this feature. That’s because the first six seconds of any given video aren’t usually the most representative ones.
So Google’s algorithm actually analyzes the whole video and then decides which six-second clip to pick.