That 5 minutes long presentation movie from 2007 really explains why Dropbox is such a success. He just simply tell us about what his product does, what problem

That 5 minutes long presentation movie from 2007 really explains why Dropbox is such a success. He just simply tell us about what his product does, what problem it solves, and how he has a good solution to "the file syncing problem". The presentation is so good that even my dad understands it.