I don't understand the copyright holder's perspective on not allowing clips of copyrighted content to exist on Youtube. Sure, if there's a full movie on YT, the

I don't understand the copyright holder's perspective on not allowing clips of copyrighted content to exist on Youtube. Sure, if there's a full movie on YT, there's a plausible mechanism for lost sales so request a takedown. But if it's a 3 minute clip from a 90 minute movie, are they really believing that someone who would have previously bought the movie is content to be watching it in 3 minute snippets on the web? It seems far more likely the opposite is going to happen which is that people are going to be exposed to movies they've never heard about before and be more pre-disposed to buy the full version. I know it's certainly happened to me quite a number of times before and there's nothing more infuriating to me than reading a blog post or reddit comment: "Check out how awesome Actor X is in Scene Y in Movie Z: <youtube link>" only to find a "This video has been removed due to a copyright complaint by XYZ LLC".