Steve221 and WeddingMaster, I'm afraid you are both factually and legally wrong.
Steve, *nobody* bought a license to view the musical. Rather, the school bought a license to perform the musical — a set number of times (the run of the show), under specified conditions (live). If Dad wasn't able to attend, then too bad so sad; he missed it. The creator's control over the rights of presentation is both justifiable and (perhaps more immediately vital from a videographer's perspective) legally protected.
WeddingMaster, you can't use creators' music in your video without their permission, regardless of how you acquired it. If you claim the music isn't part of YOUR recording, then fine — remove it. The bride and groom can dance in silence, or you can dub in some music you do have permission to use; if that's not acceptable to them, that proves that the creators' music is an essential and material part of the recording, and requires their permission. Again, the creators' right to control the use of their creations is both moral and legal.
I think you guys's mistake is that you're not viewing the matter from the perspective of the creator — y'know, the one who made and owns the music you want to use. The fact that you REALLY WANT to use somebody else's property without permission doesn't give you the right to.
