Nintendo and Youtube.

Maybe. But I seriously doubt it. I'm probably a bit biased because I've never watched a lets play and then gone out and bought the game, while I have been prevented from buying a game BECAUSE i've already watched a lets play of it.

ah true enough. honnestly I never even seen a let's play, but I watched that 30minute video and it seemed that it was just a gameplay review. Just is nice but your right that it is more likely to turn players away than to get them invested. Simply because other forms of advertising can lie about the actual experience. They are great though for getting developers to not make crappy/ boring games.

By any chance is there an easy way to find these lets play videos. Part of me feels that its something you view through the Wii U. Like the MiiVerse