Did you watch the video? The dog is offered a plate of broccoli and a plate of meat based dog food. The dog ignores the broccoli and wolfs down the meat. Twice. It could be a set up, or a friend might have been taping the demonstration of canine vegetarianism and couldn’t resist the temptation to post it.
It wasn’t broccoli that was offered. It was a salad.
It is a setup. It comes from a satire account on Twitter.
At least that’s where I saw it last week.