What does this button do?

While on youtube, I was watching Lush videos (Not lush videos... Lush cosmetics videos) and I came across a button of a football. I clicked it and the sound of a cheering crowd and vuvuzelas filled my single earphone (Yeah don't ask why there is one earphone instead of two, it's a very long story that is not worth typing up :/)
Does anyone know why it's there or what it actually is for and what it does?



Just pointing out the hopefully obvioius here, the button is circled in red with a question mark above it...