Nintendo ID Claims Youtube LPs

[Koh]

So it's illegal to review a movie, or a book or a game and profit over it, huh?

If you broadcast the entire contents of it then yes. If it's a review that only uses certain samples to get a point across, it's perfectly legal. Again, review Fair Use. You can even read up on it on Wikipedia. This only affects those trying to make money off of content that isn't theirs by the way. If you're doing LPs without monetizing your videos, you're perfectly fine, and none of this applies to you.