Someone once said that videos are a lot of work. "For every minute of screen time, it takes a whole hour of work," announced this person.
This person, whoever he or she might be, was full of crap. Evidently this person was only throwing together vacation footage and snapshots in his basement to Green Day's "Good Riddance (Time Of Your Life)," because that's utter claptrap. A major motion picture takes 600 people working overtime for 2 entire years to put together, and that's something like 3.6 million man-hours for 97 minutes of movie. Likewise, one-man production teams have to come up with concepts, shoot footage, import and organize it, edit into a cohesive video, do audio correction, do color correction, add graphics and soundtrack, export the video, compress it, and burn it to a DVD. Rather than the one-hour-to-one-minute equation, a stronger rule of thumb is to ask the producer how long the video will take to come together and when you can have it by, then assume he knows what he's talking about.
So to answer your question, no, you can't have your six-minute promo by the end of the day.