The proper instructions specific for your car are generally found in the owner’s manual. Some cars have batteries not as easy to access as those in the video. These cars generally have jumper lugs or points to use in an accessible spot.
As far as the Smart Cables, I’m in complete agreement with MTraveler. I’ve seen a lot of cheap cables get very hot trying to jump a car, hot enough to melt the insulation. This is due to cables being too small.