This was made in Maya and Blender. Rendered with Cycles. This app would combine all your music apps into one. It plays the song from the source app (subscription may be necessary), but after each song, it plays the next app/source, but all within the same app. You can have different playlists as well.

30 second animation - 0:00
15 second animation - 0:30

Music:

Music track: Island by shandr
Source: https://freetouse.com/music/
No Copyright Background Music

Music track: Summer Dreamin by Markvard
Source: https://freetouse.com/music
No Copyright Music (Free Download)

Music track: Sunlight by Luke Bergs
Source: https://freetouse.com/music
Background Music for Video (Free)