@Hatterrific
Thanks a lot for that info, makes a good impression about security!
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Regarding fixed CPM - i can not understand how fixed CPM can be better - in my opinion it can be a trap.
Im not sure how it works but im trying to imagine (just my thoughts):
Lets say a channel owner been offered a certain fixed $ per CPM,
Then he probably will be required to monetize video in all possible ad formats for that fixed CPM (Overlay in-video ads, TrueView in-steam ads, Standart in-steam ads, pre-rolls, mid-rolls, post-rolls etc.etc.) in other words making his video(s) overcrowded with ads, and if suddenly after contract and monetization in my mentioned way, a channel owner see a decent decrease of his views on his videos, and if he suspects its because his videos became an "ad farms", he can't take away certain ads to experiment and see if they affecting your visitors.... maybe im wrong but i guess there is no flexibility at all - channel owner has much less control on his videos.