I'm a huge fan of using ferrules. I even have ferrules on my deer feeder wiring and everything is landed to a terminal strip. Every device lands with 2 wires and the appropriate jumpers are on the other side of the terminal strip. None of the wire nut cluster fluck that always seem to fail. All the other guys are always dealing with deer feeder wiring failure issues. Not me.
I have one of the kits from Ferrules Direct in my field toolbox. I also carry the double ferrules, which come in handy for jumping multiple terminals in a panel. I use the insulated ferrules, so I don't need that little piece of heat like the guy in the video is using.
Ferrules are also available with numbers, to save the hassle of wire tags.
The crimpers are available in multiple profiles, square, trapezoid, hexagonal. I use the UL approved square crimpers.
Ferrules Direct Website