Guest post by Brendan Gahan (@BrendanGahan), a YouTube marketing expert. Gahan was Forbes 30 under 30 for Marketing & Advertising and has helped Fortune 500 brands with their YouTube and social media marketing. Let’s face it: YouTube has become big business. One billion unique monthly users? Yes. Six billion hours of video watched each month? Yes. Over 100 hours worth of video uploaded each minute. Yes. All, yes. The dominant player in the online video space continues to blanket the…