When it comes to getting people to watch online videos from media sites, Google is still the largest source of outside traffic. Search drives views. But the second largest source of traffic is not Yahoo, Bing, or another search engine. It is now Facebook. According to a report on Online Video & The Media Industry put out jointly by Tubemogul and Brightcove, Facebook passed Yahoo in the third quarter to become the No. 2 source of traffic to online videos at media sites. (The study measures videos across the Brightcove network, with a focus on newspaper, magazine, broadcaster, brand, and online media sites). In the third quarter, Facebook shares accounted for 9.6 percent of online video traffic. Google still towers above Facebook with more than 50 percent of the referring traffic coming from search, but that is down from the second quarter when it was above 60 percent. In fact, across all search (Google, Yahoo, and Bing), referral traffic to videos on media sites is down.