Rightster Group, a video distribution and monetisation network, said on Friday it has extended its global partnership with 20th Century Fox to extend its YouTube presence.Following the two-year contract extension, Rightster will expand Fox's branded content management in 10 additional territories in Europe.As a result, the company will manage Fox's Youtube content for 35 of its channels in 17 international markets, which will include channel management, audience development and influencer collaboration.Chief executive Patrick Walker said: "The extension of the partnership with Fox is testament to the close working relationship we've established with their international teams over the past year, and we're delighted that we can expand this collaboration to more markets in the Nordics, Eastern Europe and Africa."Kieran Breen, president of international marketing 20th Century Fox, said the partnership will help the group to increase its reach on Youtube, which he said to be "one of the most important global video platforms".Shares in Rightster fell 3.89% to 17.3p on Friday at 12:14.