YouTube automatically captions 1 billion videos with 50% increased accuracy using machine learning

Solution:

According to Google: "YouTube can use speech recognition technology to automatically create captions for your videos. The wide variety of content on YouTube obviously makes it hard to caption everything, but it also offers the company with a wide range of training data. When the YouTube community reviews and edits these automatic captions, that information then flows back into the machine learning process to make the system more accurate. The service’s automatic captions currently support 10 languages."