With about 40,000 subscribers, fuboTV is still a nascent player in the world of skinny-bundle subscription video services. But the provider of niche-sports and entertainment channels has attracted the attention of several established media powers — including 21st Century Fox and Sky, which just participated in a $15 million Series B funding round.

The companies each kicked in $6 million, and will have seats on the board. Although neither license content to fuboTV now, the streaming service says that they plan to “work closely” with it.  The $9.99 a month service currently offers channels including Univision, beIN Sports, GolTV, El Rey Network, Pivot, and Revolt.

The additional cash, which follows a $4 million round in August, isn’t earmarked for a particular purpose but “allows us to continue to build out our product,” CEO David Gandler tells me. He expects fuboTV to be profitable within four years.

Fox Networks Group EVP Ravi Ahuja says he’s impressed with the firm’s progress and believes that that “streaming services like fuboTV will drive further innovation and be a win-win for consumers and programmers.”

Others chipping in to latest funding round include former Warner Music CEO Edgar Bronfman Jr., ICM Partners’ Chris Silbermann, former NBA Commissioner David Stern, and LionTree Partners.

Previous backers include former Fox Networks Group CEO Anthony Vinciquerra and Sling Media co-founder Blake Krikorian.