I just watched the video again and noticed something just before the camera fades out at the end. I mean that there's another row behind each of the both rows of tubes.
I don't know if it was intended but this was just brilliant! I didn't notice it the first time, since i was probably to focused on the chair LOL and had my eyes in the middle of the screen afterwards (what makes it even better, since i have played Snatcher lots of times and always happen to find new things i missed before - another thing i absolutely love about this game) but man, i felt somewhat like being back in the game and in this last second, like the actual scale of the amount of Snatchers being revealed. That "shock" sound from Snatcher was right there creeping up my back. You know, the one where you see the fake Jamie Snatcher, or when you see that they have a Snatcher for Gillian, too, etc.
I think having no audio during that scene actually helped it even more.
I don't know how, but you just got to keep this one way or another in the finished mod. Maybe a scripted sequence in the same style, where you are looking at Gillian and Metal standing in front of the door, the camera zooming out more and more (just the way it already is) and then showing the final rows just before the camera changes back to the ingame view.
It has the biggest impact here, instead of in Snatcher storeroom just before this one, where they don't have their skin yet. You walk in there first, see still many but not that much "skeletons", but then you enter the next room and get the big shock when you realize that they're already much, much further ahead, with the "skeletons" just being the backup or reserve, and the main operation already being in the "skin tanks", with a much, much bigger amount of Snatchers than even ever assumed or revealed before, and almost ready to overwhelm anything standing in their way of complete domination.
I don't know if this was intentional or just coincidence, but this was just brilliant!
By the way, this would also be a great place to insert peoples' faces, taking the "...you're in here, too" literally
And maybe even a Snatcher who looks like Kojima - or at least i think he wouldn't mind LOL