Transferring Keynote to Youtube or Quicktime with delay in music and timing of slides
When exporting a Keynote prevention to video, be sure first to set all transitions to the timing that you wish.  All click events will be set to the defaults in the dialog shown below.  Change this to 0 seconds for timing and export again.  By working between the timing of your automatic transitions (usually the length of your song) along with looking at your click transitions, you should be able to get the timing right.