Google is using its expansive library of YouTube videos to train its AI models, including Gemini and the Veo 3 video and audio generator, CNBC has learned.

With more than 20 billion videos on the platform, YouTube is a treasure trove of data for AI companies to exploit – and many already have.

There are thousands of YouTube videos that can let you explore almost every part of Japan by train from your own computer.

Michael runs a YouTube channel called Skrypt – which has nearly 4,000 subcribers – with his train-hopping partner, Johnny, also 18 and from Slovakia.

Investigators said a 17-year-old charged with intentionally causing a freight train derailment in Nebraska had recorded the crash, which he then posted on YouTube.