To answer Jim's questions...
1) Sound is dubbed in from my various trips to the Georgetown Loop. The whistle and bell are GL #12 (the 2-6-2). Chuffs are a mixture of C&S #9 and GL #12. Hardest part was synching the chuffs to the wheels on the model. Thankfully the software lets me adjust that, though there was still only so much wiggle room before the locomotive started sounding drunk. (And you thought the passenger car was wobbling.)
2) Everything was shot with a Mini DV handheld camcorder. (Panasonic) It's just small enough to fit in the baggage compartment of my combine, and since my business car is not yet furnished, it fit in there as well. I may have to make provisions for making the furniture removable, as I like the shot.
3) Just one camera, multiple takes. If you're particularly astute, you might notice the sunlight changes from some of the lineside shots to the on-board stuff, which I shot three hours later. (Stupid battery died.)
4) I use Avid XPress Pro. It's basically the stand-alone software package of the edit system I use at work. It's definitely overkill for something posted on YouTube, but it's what I'm used to using.
5) I think YouTube can take Quicktime (.mov), Windows Media (.wmv) and .avi files. They've got a 1GB filesize limit, and a 10 minute duration limit. 1G sounds like a lot, but that's about 3 minutes at full DV resolution (720 x 486). I saved this clip at 400 x 300, at maybe 80% quality, and it came in at 725MB. (One of the perks of the software is that I have a great deal of control over export settings.)
Later,
K