Google has begun inserting video ads as post-roll spots on music videos from Warner Music and Sony BMG. This follows a successful test of the system involving MTV's websites. [via Fimoculous] That's going so well that it's decided to expand the system to even more publishers of its AdSense ads.

Google has announced that, even though YouTube results will show up in Google Video searches, the two operations will remain separate entities.

Some ad execs who are focused on branding campaigns say Google hinders their efforts by not allowing them to use third-party ad management software to structure their campaigns.

Yahoo will begin taking the efficiency of an ad at actually converting surfers into buyers when it places ads when it launches its new ranking model next month.

Finally, former WIN capo Jason Calacanis points to someone's fun mock up of how video ads might look if they started appearing in Google search results.

Wait a minute - what's this? Some Microsoft news? Oh-kaaaaay. The company, a perpetual third-place to the other two, has announced it's having far greater success with its display ads than search. This is shocking to whom, exactly?