>Kurt this has been around for awhile now. The problem is you
>can not pick the videos to play on your site. Google
>randomly assigns them and often they are not targeted to
>your niche. IMHO

Check out this page regarding selecting videos to display:

https://www.google.com/adsense/support/bin/answer.py?answer=81060&ctx=en:search&query=youtube+videos&topic=&type=

It looks like a complicated process while they work on the problem but it is a workaround.