Add audio to .mov files of presentation. Sync audio and edit

I have a .mov file of a Powerpoint presentation that needs audio added and synchronized to the basic script within the next 2-3 hours and possibly a second small project where we combine 3 short videos into one and review the edit transitions. This is a video of the same Powerpoint presentation, it just needs to get put back together. Everything is in sequence. It then needs to be ready for YouTube. Let me know soon, thanks. I'm awarding asap! Thanks,