> Starting next week, we will begin taking into account a new signal in our rankings: the number of valid copyright removal notices we receive for any given site.
Following the link, you get to this page of stats ( http://www.google.com/transparencyreport/removals/copyright/... ) on take-down requests. If that page is what they make their basis on, then YouTube doesn't crack the top pages, so I would guess that it won't be hurt too badly.
Although, I have no idea if their count for YouTube is accurate or not. It's not like they wouldn't have an interest in under-reporting the numbers.
"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