For content-creating work that combines music and video, this study considers improving the efficiency of the video selection process by estimating in advance how much the impression of the music will change with the addition of video. We paid attention to the amount of information had by both the music and videos and assumed that the impression change degree of music when video is combined to music, is determined by the interrelationship between the diversity or complexity of information of music and videos. In this paper, we expressed the amount of information using the cumulative contribution ratio (CCR) of principal component analysis (PCA) and analyzed the relationship between the CCR of each music and video and the impression change degree when the music and video are combined. As results, (1) The music that CCR of the lower-order component is higher -- the amount of information is less --, the impression change more when video was combined. (2) The video image that CCR is higher, that affect to the music impression more strongly. These results suggest that the CCR of PCA would be a useful indicator for estimating the impression change degree of music when video is added.