JW Player, which built a niche for itself providing an online video platform targeted to enterprises, capped off a year of growth by completing a $20 million Series D funding round led by existing investors including Greycroft Growth, Greenspring Associates, Cueball Capital, and e.ventures. The company plans to use the new capital to expand what it calls its independent video ecosystem, which allows businesses of different sizes to build an online video service over which they have much more control in terms of branding, analytics and other aspects.