I only bothered to watch the first two minutes and it was full of exaggerated sentences. "[Windows 8] prevented me from getting my work done." Really? I've had no problems getting my work done -- Visual Studio 2008, 2010 & 2012, Word, Excel, Remote Desktop, SQL Server Management Studio and our bespoke bug tracking system all work fine for me so his comments all just sound exaggerated.
I'm not saying there aren't some issues, but I frankly haven't got time for another hyperbole-ridden, techno-hipster rant about how Windows 8 is 'unusable'.