Thanks to a Facebook lead, I just found myself on a 'news' site with a video that looked interesting. When I went to click on the video, curiously I didn't see a play button and clicking on the picture didn't do anything either.

Oddly enough, right below the picture I did see a large rectangle AdSense text ad with the arrow button (you know the one that kind of looks like a big play button) enticing me to click it instead. So what this site has done is use a screenshot of the video, stuck an AdSense ad below it and then way down the page put the actual video. Slick.