I'm interested by two or three things. First, look at the carry--all three that I can really see are spine down, all handle-leftward-diagonal. That's going to mean plenty of gravity assistance in keeping them in place. I'm figuring that the draw is going to be a reach-right-hand-over maneuver that will result in a rather circular motion on actually withdrawing the blade from the scabbard. Thinking aloud, I'd expect that to do a nice job of pressing the spine of the blade into the spine side of the scabbard, thus preventing (somewhat) the dangerous pressure-toward-cutting-edge situation that can result in the blade's cutting its way through the scabbard and its leather wrap. Actually, it'd make for a pretty convenient one-handed draw, even if the scabbard-to-blade fit were very tight, wouldn't it? One downside I'd see is that it'd be easy to cut through the "edge" side of the scabbard right at the throat of the scabbard, since you'd be tempted to cut corners if you're pulling the knife up and leftward with your right hand.
It'd also result in the user having the knife pretty high and in front once the point cleared the scabbard--we're talking the handle would be right about in front of the user's face, at a minimum, when the tip came out.
I'm also interested in noting the difference between this carry and what I have seen in pictures of 20th Century khukuri carry by Gurkhas and British soldiers working with them. The usual 20th Century Gurkha carry I've seen in photos seems to be belt-slung (using a two-strap frog), vertical, and usually WAY back toward the rear on the right side--like at about 4 or 5 o'clock. This looks like it'd get in the way of sitting down, but in practice one's rear end kind of pushes the scabbard aside when one bends to sit. One picture I've seen of a from-Britain British soldier carrying a khukuri showed him using a belt-slung carry, but forward and on the left side, at about 10 or 11 o'clock, in sort of a cross-draw arrangement (i.e., with the handle angling slightly rightward across his front). But the carry in this photo looks more like what I see in old paintings of khukuri carry.
I'm also looking at the length. Though it's hard to gauge actual size when you don't know the size of the people, those knives look like they're right about at two handspans' total length for the people carrying them. On me, that'd come out to about 18 or 19 inches--probably less on someone with smaller hands. So I don't think we're looking at 20-inch-overall khukuris in this picture; what do you all think?
Any other observations?
