そもそもYouTube API自体とAdsenseは併用できません。Adsenseの規約に書いてあります。
ただしGoogleが気付かない限り(おそらく第三者にレポートされない限り)Adsenseを利用することはできます。
In the first place, you can't use YouTube API and Adsense simultaneously. It is written in the agreement with Adsense.
However, as long as Google is not aware of it (as long as no third party reports it), you can technically use Adsence.
