Google has another easter egg up its sleeve related to the World Cup beyond the previously mentioned one you would find at the bottom of Google’s Search results. This time the trick comes from YouTube. If you are watching any World Cup-related video, you’ll notice a new button near the bottom-right corner that looks like a soccer ball.
You can see it for yourself with this video. If you click on the ball button, you’ll be able to toggle on or off the familiar sound of the vuvuzela humming in the background. However, you won’t see this easter egg on any embedded videos.