Brian - I've not seen the practice clip that golfbulldog is talking about. Maybe you've taken it back down for a rethink.
Here's my tuppenceworth on this, and I'd like to see you get this (a) since I think you want it pretty badly, and (b) as it would be pretty fair payback for what you've put into the forum and youtube vids to get a wider audience
1. I think the competition will be judged on presentational issues rather than technical content. It's a truism that only 10% of what people take away from hearing you speak is what you actually say. 90% of perception is based on visuals, tone of voice and personality. There's no need for that to hurt you - but you're going to have to resist the temptation to impress with technical insights. I don't get the impression that this is a problem for you in day to day teaching, so don't let it become a problem for your video presentation. Less than 1% of people who see you on the Golf Channel will have any idea what "impact hands" are.
2. I get the impression that when you set out your stall as a teacher, you take great pride in your ability to fix Joe Average, especially Joe Average the slicer, and to fix him fast. If you do 10 mins on how to fix the common or garden slice, I think that will be pretty compelling. You know that stuff backwards, and I'm sure you'd like to do something novel - but not slicing is going to be pretty novel to an awful lot of potential viewers.
3. This is a little unfair - but you pride yourself on not having a single method. Unfortunately, I think this may work against you in this format. A ten minute taster of someone's method is an easy sell. You've got to work harder. I'm not sure what to suggest, but if you can cure the slice in 8 minutes - then you've got two minutes to put NSA in the context of the Manzella Matrix. That'll be episodes 2 and 3 at least then.
4. Personally, I think D-plane is the wrong subject for this format. You might be able to explain it in a few minutes. I doubt that you will get the average viewer to appreciate why it is so important.
5. If what you were originally doing with hitting down/FLW is to explain how some conventional advice can be exaggerated or taken too far - then I think that would work well. FLW and/or lag being taken to extremes would be a great case study as far as I'm concerned. So too might be a still head.
6. Take a leaf out of the SnT book and start with solid contact. I'm not talking about the method, but they were smart enough to realise that golfers will do almost anything for the promise of making solid contact. My experience of growing up and learning the game was that a solidly-struck slice (insofar as that's not a contradiction in terms) ranked higher than a clunky, low-flying but straight shot. How about a Top 3 ways to make solid contact?
Take this, or chuck it - but best of luck with it whatever you go in with.