The trailer itself is quite nice though.
Of course, it's not at all what's in the game itself, but it's a nice fantasy!
Putting 'Gameplay' in the title doesn't make it so..
You can't claim something to be 'gameplay', if it's not in-game.
They could've just called it 'trailer', or something like that.
I mean, I wouldn't really go so far as to call it false advertisement, but it's on par with fastfood restaurants showing their burgers in commercials.