I thought YT counted multiple viewings from the same person as a single view. Or it would be too easy to game. I at least imagine there would be a time cutoff before it considered counting a new view from the same person.
I imagine it would horrible performance-wise. You would need to store list of browser fingerprints and check it on every view.
All that being said, I do think there is some detention of fake views, especially if they come from the uploader themselves.