Adsense ads on You Tube

Here's the answer:

How do I advertise on YouTube?


There are two ways you can get your AdWords ads in front of YouTube users:
1. Advertise on YouTube Directly

You can apply to advertise directly with YouTube if you're willing to spend a minimum of $50K and you're interested in running a large branded campaign. This advertising option requires an authorized contract or purchase order with YouTube, and ads are served on a reservation-purchase basis, rather than the AdWords auction model.
Learn more about the campaign options available to you and how to apply by visiting YouTube - advertise's Channel.
2. Advertise on YouTube with AdWords

You can also target YouTube pages by simply opting your campaigns into the Google content network. You can also create placement-targeted campaigns that specifically target youtube.com placements. To see a full listing of available placements and categories across the YouTube site, select 'youtube.com' as a specific URL from within the Placement Tool and click Get Available Sites to see all available placements. Learn more about placement-targeting.
*If you're part of the Google Gadget ads beta, your ads may also be eligible for distribution.




I suppose it makes sense that for adsense to be available in the videos there are matching adwords accounts. It's just the first time I've ever seen them outside of an adsense video unit!