K-pop
Rock
Others

Singer/Songwriter

Count
348
123
112
110
80
63
44
31
15
12
11
-

Figure 5: Tonality distribution of SymMV.

A. SymMV Dataset
A.1. More Collecting Details

First, we manually search for piano covers and their cor-
responding music videos, which is cumbersome and time-
consuming. To enlarge the size of the collected dataset,
we search for several Youtube channels of professional
piano covers. We download videos with their metadata
from these channels and parse the metadata to get the
singers and song names. Then we use YoutubeAPI4 to
search for their original music video with keywords in the
format of {singer} + {song name} + Official
Music Video. We manually check all collected piano
covers and paired videos, where unqualified data like static
videos are discarded. Lastly, we utilized ShazamIO5 to rec-
ognize the soundtrack from the official music video, which
helped us search for the lyrics and genres of the music in
SymMV.
A.2. Data Distribution of SymMV
VideoBackgroundMusicGeneration