Barrapunto

Tenía curiosidad de saber por qué esa peli está en el dominio público sindo de 1968.

Wikipedia tiene la respuesta [wikipedia.org]:

The film lapsed into the public domain because of the film makers' neglect to put a proper copyright notice on the film's prints, at a time when proper notice was required to maintain copyright. (That requirement was removed with the United States' Berne Convention Implementation Act and Copyright Term Extension Act, which together provided for automatic copyright on any work once it was put into a "fixed form," and automatic copyright term renewal on all copyrighted works).

As a result, the original film is available through numerous distributors in wildly divergent qualities, is available for free download at the Internet Archive, and has spawned a parody in which the audio track has been replaced with new dialogue showing that (among other things) the heroes attempted to leave the farmhouse in order to get a pizza.

"La de Zombies" ... ¡La de Zombies!

¡¡¡¡ Aaaaahhhhhrgghhhh !!!!
¡¡¡Blasfemia!!!¡¡¡Herejía!!!

¿Como osaís llamar "la de zombies" a la grande, inconmensurable, obra maestra de todos los tiempos "Night of the Living Death" del Maestro George A. Romero "la de zombies"....

¡Habeís atraído sobre vuestras miserables almas la maldición de los muertos vivientes!¡Temblad!

P.D.: Bueno, tampoco es tan terrible, como se ve en la peli con una buena recortá en plan "Perros Callejeros II" incluso se lo pasa uno hasta bien y todo...