An electronic device and an operation method of an electronic device for video editing are provided. The electronic device include a processor electrically connected to display circuitry, wherein the at least one processor is configured to obtain a video, classify, based on a designated condition, image frames included in the video into at least one first type interval and at least one second type interval, distinguish at least one main part, based on image frames corresponding to at least one element included in the designated condition in the at least one first type interval, set a play speed of the at least one main part to be different from a play speed of at least one different part, control the display circuitry to display an edited preview video including the at least one main part reflecting the set play speed, and store the edited preview video in the memory.