“In Kuleshov’s view, the cinema consists of fragments and the assembly of those fragments, the assembly of elements which in reality are distinct. It is therefore not the content of the images in a film which is important, but their combination. The raw materials of such an art work need not be original, but are pre-fabricated elements which can be disassembled and re-assembled by the artist into new juxtapositions.”
The Kuleshov Effect is a film editing (montage) effect demonstrated by Russian filmmaker Lev Kuleshov in the 1910s and 1920s.It is a mental phenomenon by which viewers derive more meaning from the interaction of two sequential shots than from a single shot in isolation.
Here’s an example: