Yeah, same for me with Chrome. Irritating, isn't it. The site seems poorly designed. I can see a Flashblock icon in the top left so I know what's broken, but I can't click on the Flashblock icon to enable the content, as it won't take focus. Despite being interested in the topic I didn't dig deeper, so they lose a reader.

There should be a video in the background full screen, try with another browser.