He is able to communicate with severely damaged or dominant dogs, just with his energy, and his gentle touches.
What? This guy is known for his abrupt, forceful, and sometimes extreme methods. He is considered one of the least "gentle" of the modern trainers out there. Not to say his methods aren't occasionally needed for the dogs he's handling but most of his actions should not be repeated by the average dog owner. He is dealing with last chance dogs not using current recommended training methods for the average dog. I don't have time to watch this youtube episode but I can tell you how I've dealt with a very large high prey drive dog.
First I don't believe dogs and pigs should ever be left in the same room together unsupervised irregardless of cage setup, height, etc.. Accidents have happened more than once with dogs that never showed interest in the pigs or cages that people thought couldn't be reached or broken. If you have pigs and dogs the pigs either go in their own room or the dog goes in it's room or crate while you are gone. Still someone had their dogs break out of the crates and into the guinea pigs' cage. Personally I wouldn't have both if I couldn't have a solid door between them while I'm not around or paying attention.
I think it is better to show the pigs to a dog with supervision. They tend to calm down about the noises and smell and are less likely to lunge or make a sudden unstoppable attack if the pigs were to escape or similar situations. At the beginning do not take the pigs out of the cage. Let the dog in the room to sniff and listen to the sounds. Reprimand if they try to jump or get excited. Start with "NO!" "OFF!" "Leave It!" and if they aren't getting it move up to physically pulling them off the cage and putting them in a sit. All dogs should know sit. If they don't know things like sit, no, and leave it then you should not be attempting to introduce to pigs but signing up for a dog obedience class instead. When they sit quietly praise and treat. Get some good interesting treats. If you have to cut up some steak. Whatever it takes. Treats should be at least as interesting as the pigs and you should be able to remove their attention from the pigs and ask them to sit nicely before moving on.
When they will sit without jumping or getting overly excited then take a pig out of the cage. If they get excited while your catching it make them sit again and keep at it until you can get a pig without the dog trying to join in. Now hold pig within view, if necessary have a 2nd person to hold the dog, but reprimand the dog for jumping or moving out of a sit. They can look but not touch. Pet the pig. Talk softly. Say things like "nice guinea pig, be nice to the guinea pig". Give the dog a treat for sitting nicely. Anything else (including barking- teach a "quiet" command) should be reprimanded and put them back in a sit if they move. Move up to letting them sniff the pig if you think it's safe. If they show any desire to lunge or snap do not ever get the pig near that type of dog. It takes only a split second for a dog to snap and kill a pig. If they just wiggle toward you and want to sniff that's ok.
If I allow a pig within reach I keep one hand around the dogs muzzle so they can't open their mouth and then hold the pig with the other with it's head covered by my hand. I can swing the pig away and shove the dog's head down easily. Only when you can carry the pig around without the dog jumping toward it or getting in your space should you allow them closer or sit with the pigs. Including on furniture. Keep them up high in your arms until you are confident the dog is under control.
If you continue to have problems with jumping and getting too excited over things like guinea pigs I would suggest some dog obedience classes. Every dog irregardless of size, breed, or temperament should know the basics and you should have enough control to put them in a sit verbally in nearly any situation. Having that control could save not only the guinea pigs life but the dog's as well.
If you want I can take pics or possibly even vids of me working with my akita around the other animals. I have gerbils, degus, guinea pigs, cats, and horses. My dog needs to behave around all of them.