Classic Hollywood Style is the term used in the film history. According to Wikipedia, Classical style is fundamentally built on the principle of continuity editing or "invisible" style. That is, the camera and the sound recording should never call attention to themselves (as they might in films from earlier periods, other countries or in a modernist or postmodernist work).
I think, it is a style in a cinema . It follows a set of rules on how films are supposed to be put together. These rules are unspoken; they are just basic common knowledge to the film creators and expected from the film viewers. In the video that I have watched, there are different films that was shown. There are films that no sound, but if you watch it on a movie house or something, there is someone who is playing an instrumental music and the other one is comedy which is even there is no verbal interaction, you will understand easily
The style of classical Hollywood style, as elaborated by David Bordwell, has been heavily influenced by the ideas of the Renaissance and its resurgence of mankind as the focal point.
Thus, classical narration progresses always through psychological motivation, by the will of a human character and its struggle with obstacles towards a defined goal. The aspects of space and time are subordinated to the narrative element which is usually composed of two lines of action: A romance intertwined with a more generic one such as business or, in the case of Alfred Hitchcock films, solving a crime.
Time in classical Hollywood is continuous, since non-linearity calls attention to the illusory workings of the medium. The only permissible manipulation of time in this format is the flashback. It is mostly used to introduce a memory sequence of a character.
The Classic Hollywood Style is formulatic. It doesn't matter who the star is, who the director is, or who the writer is. Most mainstream films you see will have this lay out. Even though this may be the first time you have heard it called by name, you expect to see it in the theaters. It has been around since the birth of cinema, and it will most likely exist far into the future.