Answer :

hankaF
Between 1910's and 1920's the format of black and white silent films were used.

Known as silent movies, the films produced in this format were produced entirely by images. These films had complex arguments that were represented only by means of images, occasionally dialog boxes or direction known as Intertitles were incorporated, as a way to clarify the situation. In some cinemas, there was a piano or organ that was played while watching the movie, but these productions did not have any kind of built-in sound.

 I hope this information can help you.
LREH

Answer:

The format used for movies in that time was called silent movies.

Explanation:

Calling them Silent films  or movies were the films of the early era. They were without synchronized sound, from the early film around 1891 until 1927 when the first talkie was produced, although there were a few other silents later on such as city lights in 1931.