YouTube ads must be big in JapanYouTube has never been this exciting. And I don't mean the puppy videos. The video-sharing site is frenetically experimenting with every imaginable form of advertising, from prerolls to rollovers to overlays. There's even that staple of late-night television — headache pills! For this, we can thank Ben Ling, the product manager who recently returned to Google from Facebook to figure out how to make money on YouTube. But surely the most absurd ads we're seeing right now are the adaptations of Google's familiar text ads displayed on Web search results. A blog post featuring two cat-with-head-trapped-in-bag videos — a staple of YouTube users' contributions to the world of cinema — has ads "by Google" slapped on top of them. In Japanese.