In reply to CorR:
I have some sympathy with estivoautumnal's view, but I'd also say that editing together lots of clips of people falling off the same holds over and over again to show how hard a problem is really cranks up the bore-ometer. I know that's what bouldering is, but it's not very watchable.
Also, with the soundtrack, I'd try to avoid stuff that attempts to give the impression of great drama; whether that's fast metal (really, no), drum'n'bass or something that has an 'epic' or 'moving' feel to it, I find it a bit embarrassing when the climbing is just falling two feet onto a pad - it's not dramatic.
There are some bouldering videos that I like. Either exciting highball stuff (pro's) or classic problems being climbed well (not fallen off) shot nicely with some good tunes on.