Why doesn't YouTube revenue go to AdSense?

Question

Google

The first gmail has AdSense
The second gmail has a YouTube channel. In the channel, he indicated his adsense from the first gmail, writes:
The AdSense account with which you have established a connection is approved.
The following AdSense account is currently linked: AdSense
ID:
533333333333314
Status:
Active Linked
Date:
June 6, 2014 1:09 AM (GMT-7)
To update your AdSense account, click the "Edit" button below to open the website adsense. When you're done, you'll be automatically redirected back to YouTube."
In the report on YouTube, he writes that let's say a conditional 4 bucks dripped. In the adsense report, conditionally 3 bucks dripped, and all of them dripped from my other site. That is, the adsense income, as it was from the site, is all from the site, I don’t see it from YouTube.
Help me to understand.