Digital video advertising is huge, and more small companies are popping up to vie for their slice of the ad tech pie, judging by an increase in early-stage activity over the last several years. Amidst stronger years in between, 2009 was not a good year of venture funding for video ad startups, and this year hasn't been so great either. However, there's a silver lining here: only 35% of the deals in 2009 went to early-stage companies, but this year the majority of financing has been early stage, pointing to healthy investor interest in up-and-coming companies. According to the PitchBook Platform, video advertising companies have completed 20 VC financings in 2012 to date. In this time period, 55% of the deal activity has been at the early stage, with another 15% going to seed-stage startups such as Virool (Y Combinator summer 2012 class) and ThriveHive (founded in 2011), which both raised funding in July.