read the FAQ for the site (or the "Whats included" box on overview page).
"The data below consists of the copyright removal requests we've received through our web form for Google Search. It is a partial historical record that includes more than 95% of the copyright removal requests that we have received for Google Search since July 2011."
In other words youtube data is not included. This is only for websearch
That's the point. If they are going to rank links to youtube the same way as they link any other sites (as gp is using as the basis of the question), they would only use search takedown requests as the signal, not requests that youtube receives directly.
"The data below consists of the copyright removal requests we've received through our web form for Google Search. It is a partial historical record that includes more than 95% of the copyright removal requests that we have received for Google Search since July 2011."
In other words youtube data is not included. This is only for websearch