Video ad manager Adap.tv has raised a substantial second round, taking in $13 million from lead investors Spark Capital and past backers Redpoint Venture and Gemini Israel Fund. The company’s first round was for $10 million last summer, for a total raise of more than $23 million. Adap.tv says it will use the funding to accelerate the development and marketing of its OneSource ad manager platform, which lets publishers run a variety of ad types (pre-roll, overlay, etc.) from multiple sources. The San Mateo, CA-based company touts a publisher roster including BitTorrent, Metacafe, DemandMedia and Blip.tv.