Or flag it and wait for YouTube to take it down, which will take ages if it happens
some extra views
Billions, not some.
I used the word "some" loosely.
If you can afford to do it on this scale, there are probably better things you can do with your time and money.
And then the owner reupload it again, until you get broke for doing such silly things. And of course the video owner will vlog about it and YouTube will decide that they are just going to decrease the views counter.
This kinds of countermeasures generalizations based on single incidents always struck me as rather silly.