Yesterday marked the third anniversary of George Allen calling S.R. Siddarth “Macaca” while Siddarth’s camera rolled.

Macaca Day, for those of us who make our living from video on the Internet and elsewhere, is a holy day – the day that marks the birth of YouTube politics, and reminds us that citizens with cellphone cameras and a YouTube account - or at least an election.

But August 2009 isn’t merely the third anniversary of Macaca Day. It is also proving to be perhaps the most important month yet in the short history of YouTube and digital video politics.