Youtube Policy

As I'm sure everyone in the gaming community knows, Nintendo has not been the friendliest to Youtubers. Like, not at all. Nintendo is so anti-Youtube that they make copyright claims on anyone that thinks they should be able to record video footage of games that they, you know, paid for. The only Youtube Channels exempt from this are Nintendo exclusive channels like GameXplain, Chuggaconroy, Nintendo Capri Sun, etc. But why, on has to ask, is Nintendo so opposed to content sharing of their games? Shouldn't they embrace it seeing as it's free publicity and endorsement of their products? Yeah, they should. But they don't. So why then? Is it spoilers? If that were the case, they could do what Rockstar Games does, prohibit showing cutscenes. This way, they can still show people the important stuff, actual gameplay. Honestly, I don't even know myself. My guess is that the Japanese heads at Nintendo just don't get it for whatever reason.