I personally haven't ever really recorded any demos from either game, much less anything longer than a minute, tops (and those that I did record are long gone by now), so unfortunately, I can't help you much there.

I've also never seen a demo file that runs anywhere near as long as 20 minutes done by anyone else. Not to say no one has ever done so of course (though I'm not sure the game allows a single demo to be recorded while playing over multiple levels--never tried, personally), but I'm not sure there's ever been enough interest by players to try. These days, most would use a separate screen-grabbing app to record the footage for uploading on places like YouTube rather than use D1/D2's demo-capturing system, so I'm not sure how many people are going to be able to come forward with anything like you're asking for.

I mean, if you do, great, but...don't know how likely it might be. 

Descent 2 Workshop still lives, soon enough I should be posting builds on Github, though if you want one you can always bug me for one. It'll probably have bugs and unimplemented features, since at the moment I'm focusing effort on features that people are demonstrating that they want. HAM and HXM editing is pretty mature now, and at least a couple of people are trying to make levelsets with it ATM.

But I'm still around and working on crap.

No problem!  Didn't mean to nag about it.

Ello ello.

I'm talking about other gaming genres here.
without further adieu, what other genres would you like to see mixed with 6DOF?  (we've got Sublevel Zero which is 6DOF and Rogue-Like)
Personally I would like to see a 6DOF game mixed with Metroidvania (similar gameplay to Metroid and Castlevania: Symphony Of The the Night) but in first person (obviously)

Obviously, I'm still here too.

Since we ARE all here at the moment though...anybody notice PD's front page seems to be a bit...how shall I put it...under the weather?