Of course it's fake! It's right there in the title of the video... "Will it look like this?" It's clearly one person's guess as to what a Genos 2 may look like, not some sort of "official" leak or press release.
Ugawoga, I'm just curious... Why do you say a real preview would be called Genos 3, when Genos 2 has not been released?
Validates, most likely, if the new Genos does have RGB LED's, that would just most likely mean that the user could choose their own color preference for the buttons. I doubt that they would be locked into a multi-color "Christmas tree" mode.
And Eileen, I agree that there's virtually no way to tell details of the sound through a YouTube video, and that there are numerous ways these sounds could have been manipulated.