Disclosed in the embodiments of the present disclosure are a method and apparatus used for generating a video, and an electronic device. The method comprises: while displaying an original video, acquiring audio material by means of background music of the original video, and acquiring image material, determining music points of the audio material, the music points being used for dividing the audio material into a plurality of audio clips; using the image material to generate a video clip for each music clip in the audio material so as to obtain a plurality of video clips, corresponding music clips and video clips having the same duration; and according to the times at which the music clips corresponding to the plurality of video clips appear in the audio material, splicing the plurality of video clips together, and adding the audio material as a video audio track to obtain a synthesized video.