Ben Ling, a key driver of Facebook’s platform strategy who recently announced he was leaving the company, is going to YouTube. The news was first reported by Kara Swisher, who says his job will be to help turn the famously under-profitable video site into a money maker. This is actually Ling’s second stint at Google, as he previously worked on Google Checkout and other e-commerce efforts.

As for making money on YouTube? Google still says that the site’s contribution to the bottom line is negligible, and yesterday on CNBC, CEO Eric Schmidt said that even if YouTube were to remain a loss leader, it would be okay, given the amount of traffic and attention it bring to Google (NSDQ: GOOG). This isn’t a new position at YouTube: In June, the previous head of monetization, Shashi Seth, left the company to join startup Cooliris.