Music Fans is now in Beta! What is on and off-topic is still being determined; you can probably ask your question there now though. See the Music Fans Meta, there is a question on that topic there: Are questions about music videos on topic?
When this question was asked, there was no such site yet. There was a Area51 proposal however that may accept your music video question, once started:
Proposed Q&A site for music listening enthusiasts, music historians, and members of the music press corps to ask questions regarding (known) interpretations of songs, historical influences of bands, and the music industry (including production) in general
Area51 is where new sites are proposed, initial communities form and initial scope is determined. When this question was asked, the the Music Fans site was in the commitment phase, where it tries to gain enough committed members to help bootstrap the site. It gained enough committed members to open in private beta, and has now moved to public beta. It'll hopefully gain enough momentum to graduate to a permanent member of the Stack Exchange network.