I didn't find the video funny at all.
The man was angry. Why? Someone he knew, some dog he knew probably bit someone who came up and petted it. Possibly one of the dogs he trained. Not the dog he currently was walking, probably. But the man was seriously angry, and not because someone tried to interact with the dog, probably because the interaction was not appropriate, and consequences happened. The dog needed more training. The dog has a bite history.
Yes, go and get your own dog. That's really great advice. Not everyone out there should own a dog. Sorry folks, but if only the people that should own dogs, owned dogs, maybe there wouldn't be any problem at all with all the people that shouldn't own dogs for whatever reason interacting with the dogs that are there. So someone realizes they work too much, and they travel too much to own a dog, and have chosen not to. They should also decide that they should live in a world devoid of canines because they do not own one.
It is really not a good video, because it gives the wrong message. It says, that if I need to train my dog, if I need to correct my dog, then well, maybe I don't have to. Maybe it is really every one else's problem, not my dog's problem. So I am going to sit back and not socialize my dog, and not work on their reactivity or problems, because everyone else in the world should just go and get their own dog and leave mine be.
The people that truly need to see this man's opinion on the subject are not dog people and they are not spending time on the internet looking up dog videos. So they aren't seeing it. Who is seeing it are those who have dogs with issues, and wish the rest of the world would ignore their dog so that they can be lazier, less vigilant with their dog.
If your dog cannot manage normal human contact, than you, the owner has to head that off before it gets to the place where you need to correct your dog.
Please, people, if your dog has an issue, then politely tell people that he isn't a people-dog, sorry. But understand that not everyone out there that loves dogs, owns one. Maybe some people love dogs enough not to own one right now: while they are yet in school, while they are renting, while they are working a lot of overtime, while they are spending nearly full-time helping with aging parents, while they travel a lot for their job. For those of us whose dogs are not having problems, please share a moment with someone who can't or doesn't own a dog right now.
Don't hang on to them, putting your anti-social personality onto the dog.
I disliked the video. I disagree with it. I understand the guy's frustration. But it is not something we should embrace.