ReadWriteWeb this morning posted an interesting piece claiming that YouTube has seen “incredible growth in the mobile sector in recent months” following a 160 percent increase in mobile viewing last year. While “traditional” mobile video has consistently failed to gain much traction, I’m not shocked that users are increasingly tuning in to see user-generated (read: free) video on their phones. The problem is that the business model has yet to be established. Advertising pays the bills (and then some) for YouTube’s web site, but delivering that content via wireless networks is no cheap proposition for carriers. And consumers are beginning to feel that pain, too, with the emergence of metered data pricing. So I’m not real bullish on mobile video for at least the next few years.