How bout a basic HT of !0XX steels using a forge? For the newbies getting started? The simple stuff isn't really simple until you KNOW how to do it!
Also, the proper set-up and placment of the kiln to quench, how far apart they should be, and explaining the amount of time the blade needs to be gotten into the quench, for newbs, I highly recommend doing several "dry" runs, or should I say "cold" runs, working out the potential problems that could arise BEFORE handling a 1500+ degree blade.
A basic to advanced video, starting with the 10XX steels AND explaining that all simple HC steels aren't created equal, 1095 isn't a beginner steel and does need extra attention where 1084 is the most forgving of them all. That knowledge for newbs is invaluable and offers them/us the best chance for success on their first try! Then advancing to the more difficult CPM steels, that would be great if it can be included in one video, but it sounds like it may take a series of videos to cover everything indepthly.
Don't underestimate that having a good looking presenter or narrator to explain things along the way, it's a GREAT selling point, I know I wouldn't want to look at my ugly mug demo'ing anything on video! Not that I wouldn't, it kinda sounds like fun!
Another good idea is focusing on ONE thing in a short video, that is precise and to the point, keeping the video short and being able to sell them cheap would help newbs on a budget be able to buy the ones they need, once they progress to the next stage, they buy the next video, while offering the entire set as an option. Either way it's great idea, and having it broken down to have series of videos that are budget minded, along with the more advanced full spectrum and ultimatley more expensive would be the best overall for all the different makers. Well, there's my 2 cents, Rex