There is a competition planned in the near (ish) future in which the winners game will become the new official demo game that comes bundled with Visionaire Studio 4.0+.
Most of us lack the time to plan, record & edit video tutorials. There are 3 devs working on programming, fixing & improving the engine & most of their free time goes into that. Myself, on the other hand provide support via the forum, pm, email, skype & the wiki. I don't have the resources to make any good tutorials as I'm not a very adept artist & I tend to mostly deal with the development (piecing game together) & the scripting (lua) side of things.
If you want to know how to do something, then just ask on here. If you need help, then post on here... etc.
P.S: I'm currently on holiday, so my replies will be a little slow for next couple weeks.