Where did you get the video done? Especially in 72 hours!
Check out the Mixergy interview with Miguel Hernandez of Grumo Media. He talks about some great tricks you can use to make simple product demo videos.
Basically, it's really good stock illustrations + some good Keynote work + a blanket over your head to cut out the echo as you record the voiceover on your computer. I actually really enjoy making them.
Thanks for the heads-up though.
The script and storyline is important. The big takeaway that I've gotten so far has been to make it "story-based". So instead of just a screencast saying "Crowd2 helps you create a marketing campaign to advertise your products", try, "Kevin is looking for ways to tell people about his new CD release..."