I know there used to be a way to do this where you could specify how many ads you wanted and at what points in the video they'd appear, but now when you click the Monetization tab you can only select the ad formats. Was this feature removed? Normally I just leave it on the default settings anyway but for one particular video I'm experiencing a pitiful CPM, like almost 400k views and only $25 (Canadian). And I noticed that the number of estimated monetized playbacks for this video was also very low (only 22k of 280k views), so I guess the other part of my question is, is there are way to control that or ensure ads are always shown on a video (obviously discounting stuff like AdBlock)? Or is that entirely up to YouTube?