Do you believe that Youtubers can contribute to a game's success?

[MDMAlliance]

NintendoPie said:

No. Unless it's something like Minecraft.
I also find it odd that he's playing that game. Seems that most of his Subscribers subbed him for playing horror titles instead of RPG's or any other genre.

Well, out of all the people who watch the video, someone may not have known what it was or wouldn't even have given the game a shot out of ignorance of what it was.  Since the question in this thread is this: Do you think that him playing the game will boost its sales at all?
Even a single sale counts by the wording.