A lot of that perception is the camera, but when a bird drops on the water and it's another 20 yards beyond the decoy spread I'm getting the idea that the hunters didn't let the birds finish. I watched a video recently profiled here on chat somewhere bragging about a particular decoy and all of the shots were straight up for the most part and birds were falling well outside of the decoys, none of the birds were finishing, but we all have days like that. Making a video of duck hunting has got to be one of the toughest things to do, making a video of a deer hunt or turkey hunt is much easier. The video that outfits like the Duck Commander get is incredible.
As far as distance to the decoys, like i usually say, there are always variables that come into play. Wind direction, current flow, even species of duck you are hunting. Divers don't typically circle where we hunt, so you don't worry that much about overhead cover, however mallards and many other puddlers circle quite a bit, so that changes how you think when setting up decoys. I never put decoys directly in the line of sight from the direction I expect ducks to come from, but they don't always cooperate as we all know. I've been caught more than a few times with ducks coming in against the grain so to speak because I wasn't set up for that, I was in the line of sight over the decoys and didn't have good cover that direction. My blind is nothing more than some tumbleweeds most of the time that we disperse after each hunt. We never hunt from what most would think of as a duck blind. If we have three people hunting, which is typical, we will be 10 yards apart, not sitting together in a blind.
Hunting rivers and sloughs like we do here it's pretty easy to set things up to where the birds will cross in front of us and settle in behind the decoys which are placed up stream, the pocket being about 15-18 yards away on the snake river which is about 150 yards across. On the slough, which is only about 8 yards across, we have to back away from the bank another 10 yards or so to get the shot pattern time to open up. I always use a factory modified and rarely shoot over 15 yards on the first shot and never over 30 yards unless trying to finish a cripple. Shooting like that is tight and fast, more suited to diver hunters I suppose, but slow moving mallards become real easy. When birds are finishing in the decoys it's rare to need more than 10 or 12 shells to shoot a limit.
For the most part, I don't set decoys out more than 20 yards away. That's just our hunting style, right or wrong or what works for you can be entirely different.