In the northern part of the Brazilian portion of the Amazon lives a tribe that, despite all our technology, has remained removed from the modern world. They are the Yanomami, and it was only recently through aerial photos that we have gotten the best glimpse at one of their villages from above.
The village the aerial shot caught is a modern yano, which holds around 100 people in the tribe. The yano is split up according to family. Each family has a number of hammocks and a hearth for warmth at night and to cook food.
The Yanomami have centuries of dealing with people encroaching their lands but this time it's very dangerous. Mining and logging companies are rushing into their lands, seeing them as too good to pass up. This is happening even with the laws protecting the Yanomami from environmental abuse.
Yes, tribes like the Yanomami do contact the outside world. When we talk about "uncontacted" tribes, we're talking about people who have had rather standoffish or aggressive contact with modern society. This can apply to a small group hidden deep in the jungle, or a tribe that that's already made contact but has just not made a peaceful connection with other parties.
There are some that are pretty isolated, even after contact. Some have made contact with colonists centuries ago, and then vanished back into the rainforest after the pain caused by the contact. Others are just small offshoots of larger tribes that went off on their own, cutting themselves off from the bigger tribe.
That isn't the first aerial shot of an uncontacted tribe, nor was it the coolest. In 2008 a flight over the Brazil-Peru border showed a remote tribe with men and women pointing bows towards the plane. Their bodies were covered from head to toe in red or black paint!
Sadly, if governments don't make stronger actions, tribes like the Yanomami will be forced to run from their homes. This is catastrophic; these are tribes that have been in a fixed area for thousands of years. Moving them somewhere else could get them into violent conflicts with a rival tribe who see them as a threat.