The process shown in John's youtube is the basic concept.........except you use 2, 3 or even 4 strands. I prefer this type of post......
https://www.ruralking.com/4-white-poly-step-in-electric-fence-post
Not endorsing that brand or source, only showing the type I use. There are 3 or 4 outfits making them, and they are often sold at farm and home stores, or anywhere locally where electric fence components are sold.
First strand is always the bottom clip.....which will place it about 5" off the ground. I then space the posts at about 20 foot intervals on relatively level land. Closer if area is undulating. You want to take out any rises or dips, to maintain that 5" gap between the wire and soil. Depending on how secure you want to be, keep adding additional strands. I have never used more than the bottom 4, which means the top wire is only 20" or so off the ground. Most folks can simply step over it....yet it still works. For short runs or small pens and temp fences, I'd use the poly rope or poly tape, which can be tightened by hand. Even an acre or more can be worked by hand. For larger areas of more or less permanent fencing, switch to 17 gauge aluminum wire, with same step in posts, but use braced corners. Wire has to be tightened by using strainers.
Predators encounter these type of physical fences all the time and simply crawl under or through them. They will try to do the same with these fences. Goal is to have the animal make contact with the fence........it is NOT and I repeat NOT a physical barrier. It works because the animal makes contact with the fence and gets the holy crap kicked out of them, leave and never come back.
What also seems strange is that such a fence will also work to keep the chickens in. I have always trained mine with just the single bottom wire. They will walk up to it, step on it or try to crawl under it and get zapped on either their foot or comb........and it
lights them up as well. After one or two shocks, they will run around and forage up next to it, but always keeping eye on where it is. After then have been trained on the single wire, then add the extra wires for predators.
In both cases, it speeds things along if you bait the fence. Hang a strip of raw bacon over a fence and clip it down with a clothes pin. Predators will sniff or lick it......let out a yelp and head for the horizon. Chickens.......either let them find it on their own or bait under it with scratch.