Playback: Wikipedia has no entry about Playback in the form europeans know it. In english the term lip-synching is used.

Lip-synching is the process of performing with pre-recorded vocals while giving the impression of 'live' performance. It is generally considered dishonest.

Playback Theatre is an original form of improvisational theatre in which audience or group members tell stories from their lives and watch them enacted on the spot. Playback Theatre is sometimes considered a modality of drama therapy. (wikipedia)

http://www.youtube.com/watch?v=cCyPAaubENE

Das Playback ist eine Methode des Vortragens von akustischen Signalen. Dabei wird alles oder nur Teile des Vortrages von einem Tonträger abgespielt und nicht live vom jeweiligen Interpreten vorgetragen.

Beim Voll-Playback wird der gesamte akustische Vortrag von einem Tonträger abgespielt.

Das Vortäuschen wird durch Fehler des Interpreten beim synchronen Lippenbewegen oder Störungen beim Tonträger offenbar. (wikipedia)

The Onion is an American news satire organization. It features satirical articles reporting on international, national, and local news as well as an entertainment newspaper and website known as The A.V. Club. It claims a national print circulation of 690,000. Since 2007, the organization has been publishing satirical news audios and videos online, as the "Onion News Network".
http://www.theonion.com/