I think, if you make a decent video series of tutorials covering the basics, it will be useful. And then a SEPARATE one, labeled as advanced stuff for after the initial fortress construction, for advanced things, would be great.
The basics include such things as standard (unmodified) key commands for vanilla Fortress and Adventurer modes, which would be separate videos; a run-through of ALL the interface screens and the announcements/reports tabs at once, and then some demonstrations on looking at dwarves and animals for Thoughts/Preferences, Health, various other stuff like Skills and Inventory. Then, on to the "doing stuff" part, after doing a FULL Embark setup, so working through all items and talking through it. Then get on with building crud in whatever biome. Maybe talk about the other types - i.e. volcano, Ultimate Evil biomes, and whatnot else. Demonstrate some Dwarf Physics and SCIENCE, go through how the Z-levels and tiles work, movement things, stockpiling, burrows, and emergency orders. Perhaps an entire video on military stuff - conscripting, arming, training. Establish basic facts on workshops first, then advanced things, then finally Dwarven Storage (QSPs) and high-efficiency workshop setups. Perhaps also cover wild animals - i.e. wandering giant wombats, bunnies, cats(plosions), dragons, rocs, jabberers, and the odd giant one-eyed hairless fire-breathing evil bunny come to ruin your fort (Madman198237 posted about that somewhere, I believe, about a year or two ago in the What's Going on in Your Fort page; hard one to forget, really) with its ... inability to fly across the raised drawbridge. Whoops. Talk about basic defense, advanced defense, animal care/use, butchery, carpentry, elves, humans, real sentient beings (dwarves), and whatnot else may come up.
And above all make it interesting. If the fort dies within 5 minutes, or else succeeds sometime quickly with, Idk, wrecking a goblin siege, then great!
Yeah, you should do it. I figured it out trial-and-error style, with occasional (2-second gap) references to the wiki.