Sanz y el secreto de su arte

Sanz y el secreto de su arte is a Spanish, medium-length, silent film of 1918, directed Francisco Sanz Baldoví and Maximilià Thous. Its style makes it fit into the docudrama genre. The film is led by ventriloquist Francisco Sanz Baldoví and his Automats. It provides a certain approach to the work of Sanz, although the absence of sound makes it difficult to appreciate in its whole entirety. It also provides an explanation of how the various artist dolls works. Finally, it is a historical document about the ages it was filmed. It was recovered and restored in 1997 by the Valencian Institute of Cinematography.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.