Joyn streaming preps German launch Details Michelle Clancy | 09 May 2019 Joyn (formerly 7TV) is prepping a June launch for its streaming service in Germany. The company, a joint venture of ProSiebenSat.1 and Discovery, offers live streams from more than 50 TV channels, along with on-demand offering of original series, shows, exclusive previews and local content. It also offers content seven days before TV broadcast and 30 days after, on catch-up. Joyn is available via smartphones, tablets, web and smart TVs.