Zweites Deutsches Fernsehen, officially abbreviated as ZDF, is a German public-service television broadcaster based in Mainz, Rhineland-Palatinate. Zweites Deutsches Fernsehen officially abbreviated as ZDF is a German public- service television broadcaster based in Mainz,. ZDF (Zweites Deutsches Fernsehen) is Germany's national public television broadcaster. ZDF (Zweites Deutsches Fern sehen) is Germany's national public television broadcaster. Other articles where ZDF is discussed: Germany: Broadcasting: …by a second television network, ZDF (Zweites Deutsches Fernsehen), which is based in Mainz. The ZDF just released 50 explainer videos from its documentary series, "Terra X" under CC BY and CC BY-SA—with more to come!.