I've seen footage from three sides, as most that care to watch it have. I don't feel excited when I see an American aircraft getting a kill on another country's aircraft, or pilot on another country's pilot if you want to look at it that way. I do however think about the poor bastard that just got shot down. Or the 10 poor bastards that just got shot down if it's footage of LW shooting down B17's.
Of course, does anyone have trouble watching footage of artillery firing on enemy positions? It's fairly impersonal, as is most guncam footage. You rarely, if ever, see the pilot or crew that were in the splashed plane.
Ok, maybe a bad example, but I think my point was made.
I'm more upset with the selling of this footage. I would assume that this would be government material that should be free for all to see, and needs to be kept in the public eye.
edit: I understand those that find it disturbing to watch an aircraft with a person in it getting shot down, likely ending that persons life. Those that enjoy watching one side doing the shooting, and are upset by the other side doing the dieing in 60 year old footage should probably take a look at themselves.