Online video infrastructure firm Nokeena Networks has picked up $6.5 million in a second round of funding—bringing its total raise to just over $15 million. Mayfield Fund led the round, with participation from previous investors; Nokeena will use the new funding for sales and marketing. The Santa Clara, Calif.-based startup’s main product, Media Flow Director, reduces costs and increases the quality of streaming video for content providers (including video publishers, aggregators and ad networks). Release.