Creators claim their videos were used without their knowledge AI companies are generally secretive about their sources of training data, but an investigation by Proof News found some of the wealthiest AI companies in the world have used material from  thousands of  YouTube videos to train AI. Companies did so despite YouTube’s rules against harvesting materials from the platform without permission.Our investigation found that subtitles from 173,536 YouTube videos, siphoned from more than 48,000 ...