When YouTube (NASDAQ:GOOG) recently revealed plans to introduce a pay-for-content subscription model a single question sprang to mind among market investors: Why bother? Hadn't Google heard about the unprecedented subscriber losses seen by TV providers like Cablevision (NYSE:CVC) and DISH Network (NASDAQ:DISH) in 2011? And did the company know that those losses portended a massive beating -- specifically a 58% decline in annual viewership -- for the popular Web-based streaming video site Hulu (NASDAQ:CMCSA) in 2012? It’s plausible to say Google is leveraging its 70% saturation of the mobile smartphone market. One projection has smartphones accounting for more than ...