Very cool vid!
As far as the essay goes, the formatting should be 12pt TNR, standard margins, single-spaced on white paper. Don't staple, paperclip if you must. Put your name on the top right corner of every page, because the data-entry people will love you for it (do this on the computer, not with your pen or pencil). If there's a one-page limit, don't push it by extending the margins or doing it in a smaller font. They only allow you one page because they want to challenge you to say it all in one page; by manipulating the format to give yourself more room, you're essentially telling them that because you weren't up to their challenge, you'll try to weasel out on a few technicalities.
And I'm not saying that it's what you're actually thinking, because I feel your pain about length-limited essays, but it's how they're going to take it.
Other advice: Don't read the books that are just compilations of essays written by other students because you'll either get the urge to plagerize or just feel depressed because your essay isn't nearly so interesting. The books that talk about how to write it are good, but avoid the ones that are just page after page of student essays.
Don't tell them things they already know. Don't talk about your GPA and your ACT scores, and don't rattle off your extracurriculars like the names of your kids--your essay is not the chance for you to prose up what you filled in on the application. Picking one thing (tricking would definitely be a good choice) and going into detail about it, or telling a related anecdote, is a better idea. Or try telling them something about you that they wouldn't know just from reading the application.
Hope this was helpful--if I come across as short, I don't mean to, I just know this stuff inside and out. Good luck!
