If the first pre-service slide is a video that doesn't have it's own audio, the playlist has to be attached to the second slide, and any following videos play the background music if the background audio is selected. However when returning to the top, the first video slide stops playing the music even though background audio is selected. I can live with attaching the playlist to the second slide, but I would think the music would continue when returning to the top. I can get around this by putting a blank 1 second slide on the front and adding the playlist there.