I believe that Bob B. has converted his cars to Kadee couplers and uses the same hand methods to uncouple them as the smaller scale folks. I believe that this was edited out of the video for some reason. You will note that all the switching in the video occurs within easy reach of the aisle.
When you think about it, all prototype uncoupling is done by hand. The "scale" operators don't have any problem with hand uncoupling.
Our large claw couplers are difficult to uncouple both by hand and by electro-magnet. You really have to anticipate where you want uncoupling to happen to use electro- magnets. Claw couplers are also very difficult to couple. I find that I must really bang most of them together. This causes more derailments than I care to mention.
Another problem with the claws is that they often fail causing trains to come apart. Kadee type couplers are much more reliable in my experience. We operate 100 car HO trains at my club without problems.
Wow, good discussion! I have a few comments in reply to what NH Joe posted.
I do not use Kadee couplers. My goal was to design an operating railroad using 3-rail trains and I wanted to retain the 3-rail couplers. The video was not edited to omit Kadees, there just aren't any. Yes, the switching in the video was within easy reach of the aisle. The site was chosen so that the camera on its tripod could be very close to the action. In switching districts that are an easy reach from the aisle, we uncouple manually by depressing the tab on the side of the couplers. This is no less realistic than the skewer method most use with Kadees. I also have ground throw switches in those areas (Caboose Industries #208s). Real local freight crews uncouple and throw switches by hand and so do we.
I do have some switching areas that are 4 or 5 feet from the aisle. Switches in those areas are powered with either twin-coil or Tortoise machnes and all uncoupling in those areas is via electromagnets. They are very reliable. We do not try to spot a car exactly over a magnet to uncouple. Instead, the car is pushed past the uncoupling point by a couple of inches. The locomotive then reverses direction and slowly pulls the car toward the magnet. The magnet button is held down and when the car reaches the magnet, it uncouples. I have "planted" a tuft of tall yellow grass next to each uncoupler so that crews can easily spot them.
Difficult coupling of 3-rail couplers can definitely be a problem. The manufacturers have done us no favors in that regard by their lack of a standard set of dimensions for the knuckles. Lionel knuckles in particular are not as deep as those from other manufacturers.
Those with successful operating layouts in all scales have several things in common. One of those is standardization. Mixing coupler types causes operating problems in HO (there are several Kadee "clones" that don't work nearly as well) as well as in 3-rail O. In my case, I use Atlas or "old" MTH (before they changed to the current tabless design) whenever possible. In the video I show how I modify these couplers to work almost as smoothly as Kadees. Weaver diecast couplers are also pretty good. I've had trouble getting K-Line and Lionel couplers to mate with Atlas, so there are no K-Line cars on my railroad and a total of 10 Lionel cars (out of about 350 cars on the railroad). The Lionel cars run in through train blocks and are not switched into local industries. I have quite a few cars on the layout that were 2-rail originally. These have all been converted to use Atlas or Weaver trucks and 3-rail couplers.
I have no problems with 3-rail couplers parting, but the longest trains we run are 12 cars up a 3.5% grade.
Regarding electrocouplers on freight cars, remember that there are only 99 addresses available in TMCC. If you want to be able to control the coupler on each end of the car separately, it takes two addresses per car. It doesn't take long to use up the 99.
Interesting operation can be designed into any moderately sized layout, as Bob Delbridge has demonstrated above. The "typical" 3-rail layout with multiple loops of track crammed everywhere is not compatible with prototypical operation however.
Ron touches on one other point: prototypical operators will trade added operation (another industrial spur, an interchange track or whatever) for scenic beauty every time. I am fortunate to have enough space for both. Note that I have rebuilt many areas of the Pennsylvania & Western to add switching opportunities. This past Spring I added a coal mine, two team tracks, an industrial coal supply track and a freight/express station. These provided new switching capacity for 17 cars.