From What topics can I ask about here?, it's clear that "recommendations of pieces to listen to, study, or play, or that meet particular criteria" are off-topic. However, would asking what knowledge one need to know to search for such pieces on-topic?
Below is my draft.
I am making a video for a friend to ask for their help, because my problem is complicate and they don't have time to fully investigate it. Each sentence I say will uncover some thing they do not know, and they may need to digest it/verify it before accepting my words. Only after seeing that my rational is reasonable that they can have the reason to help me. In other words, it's not about uplifting them, but about encouraging them to investigate the problem with me. The video is basically a long elevator pitch.
What knowledge I need to find the suitable background music? In what way a piece of music can be composed to reflect the mood of curiosity and skeptical?