We wrote in a previous post about the bevy of savvy real estate companies utilizing TubeMogul to distribute videos of home tours to boost their organic search rankings (so a search for homes for sale in a given city or neighborhood might pull up a video tour on YouTube, in addition to the text listing). With housing prices tumbling due to the subprime fallout, competing in web video, once novel, is now a must (not to mention being free). On that front, The Future of Real Estate Marketing blog reports that Century 21 recently launched a YouTube channel, with owners submitting tour videos of their homes (i.e. below). Of course, online real estate video pioneers, such as our friends at WellcomeMat (who featured us in their “Top 50″ marketing tools for real estate), saw this coming.