The principle is that the music is only 1 seconds, but you have 2 seconds to shoot the video, so the music is not enough.

Music is an art form and cultural activity, and its medium is sound waves (a kind of mechanical waves) which are organized regularly. Its basic elements include strength, tonality, duration and timbre. These basic elements are combined with each other to form the common "formal elements" of music, such as rhythm, melody, harmony, strength, speed, mode, form and texture. The formal elements that constitute music are the means of expression of music. Music of the same genre may emphasize or ignore some elements.