This fellow has been feeding the raccoons for about 20 years and raccoons are particularly adaptable when it comes to food. While they do become rather bold, as you can see with this fellow, they are smart enough not to menace someone who is feeding them. Rabies is the only disease that would be a concern to humans but a rabid animal would be unlikely to be among a large group of raccoons since the disease affects the brain, making them disoriented and far more likely to be on their own. They also carry distemper, so it may not be a great idea if you have dogs or cats that spend time outdoors, who may encounter these visiting animals, although your pets certainly should be vaccinated if they are going to be outdoors.
That said, as an urban dweller, I am accustomed to seeing many raccoons living in the neighborhood. They are called trash pandas for a reason. Any issues regarding rabies or distemper apply whether you feed them or not. I wouldn't advise urban or suburban dwellers to feed raccoons because they can be such a nuisance and they are apt to become very bold with people who don't care to feed them. The fellow in the video appears to live in a more rural setting near the woods, so the raccoons specifically patronize his home and go back to the woods to live.
When I was a kid, we always used to feed the squirrels, especially during the winter. Some would even take food from your hand. There was never an issue. I think feeding wild geese is more of an issue - they can be really aggressive.