PixelProspector offers a great guide on gamedev marketing
http://www.pixelprospector.com/the-marketing-guide-for-game-developers/
List of various youtubers
http://gameyoutubers.com/
Helps you to find right youtubers
http://videogamecaster.com/
http://videogamecaster.com/big-list-of-youtubers
http://videogamecaster.com/resources