For the past four years, TubeMogul has built itself up as one of the premier tools for online video producers to syndicate and analyze their online videos across the Web. Last year, it launched a video ad network called PlayTime that took advantage of all the video viewership data it was collecting, and on the strength of that product it raised $10 million last October. The company has been busy putting that money to work building on top of PlayTime to create a soup-to-nuts video ad platform around which it is relaunching the entire company today. TubeMogul is now completely focussed on brand advertisers and their digital ad agencies. CEO Brett Wilson says it is "one place they can buy, place, track and optimize their video ads." He calls it a demand-side platform (DSP) for video ads, much like Google-owned Invite Media is a DSP for ad agencies . It's not just an ad network, it's a whole lot more, folding in analytics and the ability to selectively place video ads on specific sites, or even to tie into existing advertising relationships.