That vid is talking about the standard American diet, which we all know leaves a lot to be desired and which Australia is rapidly mimicking much to the chagrin of some.
Then there is the pundit Jordan Peterson, " steak is a meal " and his carnivorous diet of consuming only beef, salt and water!
I can bring up research that counteracts a meat eating diet specifically from the Mayo Clinic claiming the same diseases on a meat eating diet.
And what you don’t eat also can harm your health. Diets low in nuts, seeds, seafood, fruits and vegetables can also make your health risks go up. The good news is that even eating less red and processed meat has a positive effect on health. Mayo Clinic
A kind of healthy eating is key to the Mediterranean diet, which focuses more on fruits, vegetables, whole grains, beans, nuts, legumes, lean proteins such as fish and poultry. It’s also key to other cuisines, such as some Asian, Ethiopian, Indian and Middle Eastern diets. These diets limit red meat.
The nations in the world that live according to plants of the field, the vegetables, fruits, grains, nuts, seeds, vegetables, little or no red meat, is all that man requires to live a healthy lifestyle and according to that lifestyle have the greatest longevity and the least number of degenerative diseases in the world, again “the proof is in the pudding”, so to speak.