From the Youtube post:
The children saw what they thought was a flash of lightning streak across the sky. They were sure it meant that rain was coming. But it was followed by complete silence. No wind, not even a breeze broke the calm and quiet of the moment. They were confused. There were no clouds in the sky. But it must have been lightning. They had better get the flock to safety. Another burst of light flew by them. They couldn’t move.
Then, gently, quietly, what seemed like a bubble of light rested on top of the holmoak tree in front of them, and Mary was there. The most powerful message Mary had ever given the world was beginning. Years later, Lucia described the scene,
“It was a lady, clothed in white, brighter than the sun, radiating a light more clear and intense than a crystal cup filled with sparkling water, lit by burning sunlight.”
To anyone analyzing the visits of Our Lady to earth, it becomes immediately obvious that she had an urgency this time that we’ve never seen before. On that first day, she gave these little children, who could not possibly understand, HER KEYNOTE MESSAGE OF FATIMA. Everything she wanted to communicate to the people on earth was touched on in that first apparition.
Mary opened the conversation. “Do not be afraid. I will not harm you.”