At this point all the content on youtube is corporate sponsored or belongs to a handful of super-creators that make all the ad revenue. Why they even call it "you" tube at this point is beyond me, should just go full sponsored content and be done with it. It's hilarious, open YouTube in a private window of your browser of choice, and look at what they serve up, try and find something that isn't from a media company,…
The question we should be asking, is how much of Youtube's revenue comes from the longtail of their content (and how much that longtail acts as a funnel into their service).