Google Introduces YouTube Overlay Ads

According to Ad Age, Google announced that they will be selling Overlays on YouTube videos. Essentially it is a long tail approach, much like buying keywords on Google. Advertisers can buy words and select the videos the overlays will appear on - e.g. a "dog on skateboard" video may have an ad overlay to Pets.com. The long tail nature here means they will need to make their $ here based on volume vs. individual mass buys. Overlays can be purchased by CPM or cost per click. Interesting to see how this goes - may be a nice balance between maintaining the credibility of YT amongst users, and allowing advertisers to tap the audience, thereby skirting the longtime YouTube conundrum (how do you maintain cred with users but also make advertisers feel safe in the existing environment).