Also, fun fact: Copying/pasting the code in that minified file either results in weirdness or complete crashing from Notepad++, depending on the file encoding setting.
From their website:
"We were brought in by adam&eveDDB to work on interactive pop-up book designed to showcase the talent and innovation of Google’s Creative Sandbox Gallery, and built entirely in HTML5 and CSS3."
Correction: HTML5, CSS3 and.. Flash.
According to martinp, the code was removed after his initial post.
While the site does indeed has flash, it's just because the standard YouTube's player respecting previous selections (or lack thereof). I used to have YouTube as HTML5, but recently re-installed Chrome recently and I guess it went back to Flash as a default player.
So, kudos to the developers. No more "but"..
[1] http://www.wearehive.co.uk