Standard practice here has been to enter the bonus music content (the enclosed music CD) without the main video disc(s) when dealing with a video product that isn’t a concert - same as what VGMdb does. There are literally thousands of such Japanese music releases already in the database omitting the main TV/movie disc(s).
In practice, this is how data has been entered here:
- If the product is supposed to be music (in other words, the main disc is music), then we include all the bonus discs, even if the bonus discs are interviews/data rather than music.
- If the product is supposed to be TV/movie (in other words, the main disc is not music), then we ignore the main disc, and enter the bonus audio disc(s) as if it were a standalone release.